JP3399669B2 - Digital temperature compensated piezoelectric oscillator - Google Patents
Digital temperature compensated piezoelectric oscillatorInfo
- Publication number
- JP3399669B2 JP3399669B2 JP29072994A JP29072994A JP3399669B2 JP 3399669 B2 JP3399669 B2 JP 3399669B2 JP 29072994 A JP29072994 A JP 29072994A JP 29072994 A JP29072994 A JP 29072994A JP 3399669 B2 JP3399669 B2 JP 3399669B2
- Authority
- JP
- Japan
- Prior art keywords
- digital
- analog
- temperature
- signal
- converter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000006243 chemical reaction Methods 0.000 claims description 17
- 230000006870 function Effects 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 description 11
- 238000004891 communication Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 5
- 238000010295 mobile communication Methods 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 1
Landscapes
- Oscillators With Electromechanical Resonators (AREA)
- Superheterodyne Receivers (AREA)
Description
【０００１】[0001]
【産業上の利用分野】デジタル温度補償圧電発振器の温
度補償制御系の制御に関する。TECHNICAL FIELD The present invention relates to control of a temperature compensation control system of a digital temperature compensation piezoelectric oscillator.
【０００２】[0002]
【従来の技術】図４に従来技術を系統図で示す。あらか
じめＶＣＸＯの温度特性に対応する補償情報をメモリに
記憶させておき、温度センサからの温度情報をアナログ
／デジタル変換（以下，Ａ／Ｄ変換と言う）してアドレ
スとしてメモリに供給する。アドレスに供給されたメモ
リは、対応する補償情報を読み出す。アドレスから読み
出された補償情報をデジタル／アナログ変換（以下，Ｄ
／Ａ変換と言う）してＶＣＸＯを制御して周波数の温度
補償が行われる。2. Description of the Related Art FIG. 4 is a system diagram showing a conventional technique. Compensation information corresponding to the temperature characteristics of the VCXO is stored in the memory in advance, and the temperature information from the temperature sensor is subjected to analog / digital conversion (hereinafter referred to as A / D conversion) and supplied to the memory as an address. The memory supplied to the address reads the corresponding compensation information. The compensation information read from the address is converted from digital to analog (hereinafter D
/ A conversion) to control the VCXO to perform temperature temperature compensation.
【０００３】[0003]
【発明が解決しようとする課題】従来技術では、発振器
の周囲温度が変化した場合には周波数を補償する動作を
行うため、急峻に周波数が変化する瞬間が生じる。この
周波数の急峻な変化が通信中に起こると例えば移動体通
信で発振器を使用されていた場合に、通信エラーが生ず
るという課題があった。In the prior art, when the ambient temperature of the oscillator changes, the operation of compensating the frequency is performed, so that there is a moment when the frequency suddenly changes. If this sharp change in frequency occurs during communication, there is a problem that a communication error occurs when an oscillator is used in mobile communication, for example.
【０００４】[0004]
【課題を解決するための手段】送信及び受信を行ってい
る間はデジタル温度制御発振器の温度変化に対する周波
数の補償制御機能を一時的に停止させることで課題が解
決できた。The problem can be solved by temporarily stopping the compensation control function of the frequency with respect to the temperature change of the digital temperature controlled oscillator while transmitting and receiving.
【０００５】[0005]
【背景】本発明のデジタル温度制御発振器は、移動体通
信における基地局と移動局で行われる通信に使用される
移動局用の局部発振として用いられることを前提として
いる。移動体通信における基地局と移動局で行われる通
信は、図３に示す様に時分割で行われている。図３では
通信時間内を２０ｍｓづつに分割しその２０ｍｓの中に
送信及び受信の時間に約１６ｍｓを費やし、スペース時
間を約４ｍｓ設定している。このスペース時間の約４ｍ
ｓの間にデジタル温度制御発振器の温度変化に対する周
波数の補償制御を行い、送信及び受信時間の約１６ｍｓ
ではデジタル温度制御発振器の温度変化に対する周波数
の補償制御は行わない様にする。理由は、送信受信時の
１６ｍｓの間に急峻な周波数変化があると、通信にエラ
ーを生ずるためである。Background The digital temperature controlled oscillator of the present invention is premised to be used as a local oscillation for a mobile station used for communication performed between a base station and a mobile station in mobile communication. Communication performed between a base station and a mobile station in mobile communication is performed in a time division manner as shown in FIG. In FIG. 3, the communication time is divided into 20 ms, about 16 ms is spent for the transmission and reception time within the 20 ms, and the space time is set to about 4 ms. About 4m of this space time
The frequency compensation control for the temperature change of the digital temperature control oscillator is performed during s, and the transmission and reception time is about 16 ms.
Then, the frequency compensation control for the temperature change of the digital temperature control oscillator is not performed. The reason is that an abrupt frequency change during 16 ms during transmission and reception causes an error in communication.
【０００６】[0006]
（実施例１）図１に本発明の系統図を示す。温度センサ
部１からアナログ温度情報をＡ／Ｄ変換部２によってデ
ジタル信号のアドレスとしてメモリに供給する。メモリ
３には予めＶＣＸＯ５の温度特性に対応する補償情報が
記憶されており、温度情報をアドレスとしてデジタルの
補償情報が読み出される。メモリ３から読み出されたデ
ジタル情報をＤ／Ａ変換部４でアナログ信号に変換し、
ＶＣＸＯ５に供給し、ＶＣＸＯ５の周波数を制御してい
る。このデジタル温度補償圧電発振器に外部よりラッチ
端子７にラッチ信号をもらいＶＣＸＯ５を制御する信号
を停止するように、Ａ／Ｄ変換器又は／及びＤ／Ａ変換
器を停止させるラッチ信号を受けるようにしている。例
えば移動体通信において、送信及び受信時間の１６ｍｓ
の間はＶＣＸＯ５の周波数が変わらないよう、Ａ／Ｄ変
換部又は／及びＤ／Ａ変換部にラッチをかけている。す
なわちラッチをかける時間は、２０ｍｓのタイミングの
繰り返しのうち、送受信時間の１６ｍｓ間である。(Embodiment 1) FIG. 1 shows a system diagram of the present invention. The analog temperature information from the temperature sensor unit 1 is supplied to the memory as an address of a digital signal by the A / D conversion unit 2. Compensation information corresponding to the temperature characteristics of the VCXO 5 is stored in the memory 3 in advance, and digital compensation information is read using the temperature information as an address. The digital information read from the memory 3 is converted into an analog signal by the D / A converter 4,
It is supplied to the VCXO5 to control the frequency of the VCXO5. The digital temperature-compensated piezoelectric oscillator receives a latch signal from the outside at the latch terminal 7 so as to stop the signal for controlling the VCXO 5, and receives the latch signal for stopping the A / D converter and / or the D / A converter. ing. For example, in mobile communication, 16ms of transmission and reception time
During this period, the A / D converter and / or the D / A converter is latched so that the frequency of the VCXO 5 does not change. That is, the latching time is 16 ms of the transmission / reception time in the repetition of the timing of 20 ms.
【０００７】（実施例２）
図２に他の実施例を示す。送受信機からの自動周波数制
御信号（ＡＦＣ信号）をＶＣ端子６よりＶＣＸＯ５へ供
給する構造の場合には、このＡＦＣ信号の変化を、ラッ
チ信号を出力するトリガとして利用している。ＡＦＣ信
号は、例えば基地局から、デジタル温度補償圧電発振器
が搭載されている移動局へ、周波数偏差を伝えて補正す
るために使用される。もともと移動局の発振器自体でも
温度補償を行っているが、それでも周波数がズレてしま
うため、基地局からのＡＦＣ信号が必要となる。(Second Embodiment) FIG. 2 shows another embodiment. In the case of the structure in which the automatic frequency control signal (AFC signal) from the transceiver is supplied from the VC terminal 6 to the VCXO 5, this change in the AFC signal is used as a trigger for outputting the latch signal. The AFC signal is used, for example, to transmit and correct the frequency deviation from the base station to the mobile station equipped with the digital temperature compensation piezoelectric oscillator. Originally, the oscillator itself of the mobile station also compensates the temperature, but the frequency still shifts, so that the AFC signal from the base station is required.
【０００８】移動通信における基地局と移動局との間で
行われる通信は、図３に示す様に２０ｍｓの間隔で繰り
返すが、移動局の送信及び受信に約１６ｍｓの時間がか
かる。移動局の送信時に基地局で移動局の周波数偏差を
測定し、移動局の受信（基地局の送信）時に周波数偏差
データを移動局に送る場合がある。また移動局でも送信
及び受信間に移動局の発振器が温度などの影響で周波数
が変化する。この基地局からの周波数偏差データ又は／
及び移動局の温度等による周波数偏差を移動局の送信及
び受信の間以外の時間、すなわち図３の２０ｍｓのうち
の約４ｍｓの間に周波数を補正し、受信及び送信時間の
約１６ｍｓ間には周波数をロック（ラッチをかけてい
る）している。The communication performed between the base station and the mobile station in mobile communication is repeated at intervals of 20 ms as shown in FIG. 3, but it takes about 16 ms for transmission and reception by the mobile station. In some cases, the base station measures the frequency deviation of the mobile station during transmission of the mobile station and sends the frequency deviation data to the mobile station during reception of the mobile station (transmission of the base station). In addition, even in the mobile station, the frequency of the oscillator of the mobile station changes due to the temperature or the like during transmission and reception. Frequency deviation data from this base station or /
The frequency deviation due to the temperature of the mobile station is corrected during the time other than during the transmission and reception of the mobile station, that is, during about 4 ms of 20 ms in FIG. The frequency is locked (latched).
【０００９】[0009]
【発明の効果】本発明は、通信機の局部発振器に用いら
れるデジタル温度補償圧電発振器のＶＣＸＯを送信受信
の行われる１６ｍｓの間ＶＣＸＯの周波数補償を行わな
い様にラッチを掛けることにより、送信受信の行われる
１６ｍｓの間に急激な周波数変動を起こすことが無くな
った。また基地局から周波数偏差の情報をもらい、ＶＣ
ＸＯのＶＣ端子を直接制御することで通信の間中、移動
局の周波数が基地局により制御されているので、急激な
周波数変動が避けられて通信エラーが著しく減少した。According to the present invention, the VCXO of the digital temperature-compensated piezoelectric oscillator used for the local oscillator of the communication device is latched so that the VCXO is not frequency-compensated for 16 ms during the transmission and reception. No sudden frequency change occurred during 16 ms. Also, the frequency deviation information is received from the base station, and the VC
Since the frequency of the mobile station is controlled by the base station during the communication by directly controlling the VC terminal of the XO, abrupt frequency fluctuation is avoided and the communication error is significantly reduced.
【図１】図１は、本発明のラッチ信号をもらって周波数
補償を制御する実施例を示す系統図である。FIG. 1 is a system diagram showing an embodiment for controlling frequency compensation by receiving a latch signal according to the present invention.
【図２】図２は，本発明のＶＣ信号からセンシング回路
を経てラッチ信号を作り、周波数補償を制御する実施例
を示す系統図である。FIG. 2 is a system diagram showing an embodiment in which a latch signal is generated from a VC signal of the present invention through a sensing circuit to control frequency compensation.
【図３】図３は，本発明の通信状態を示すタイミングチ
ャートを示す。FIG. 3 is a timing chart showing a communication state of the present invention.
【図４】図４は，従来技術を示す系統図である。FIG. 4 is a system diagram showing a conventional technique.
１ 温度センサ部 ２ アナログ／デジタル変換部 ３ メモリ ４ デジタル／アナログ変換部 ５ ＶＣＸＯ ６ ＶＣ端子 ７ ラッチ端子 ８ センシング回路 1 Temperature sensor section 2 analog / digital converter 3 memory 4 Digital / Analog converter 5 VCXO 6 VC terminal 7 Latch terminal 8 Sensing circuit
Claims (3)
されたアナログ温度信号を入力しＡ／Ｄ変換するアナロ
グ／デジタル変換部と、該アナログ／デジタル変換部か
ら出力されたデジタル温度信号をアドレスとして供給さ
れるメモリと、該メモリから出力される該デジタル温度
信号に対応するデジタル補償信号を入力しＤ／Ａ変換す
るデジタル／アナログ変換部と、該デジタル／アナログ
変換部からの出力されたアナログ補償信号を供給し制御
されるＶＣＸＯとより構成されるデジタル温度補償圧電
発振器において、 該アナログ／デジタル変換部及び該デジタル／アナログ
変換部に、該アナログ／デジタル変換部及び該デジタル
／アナログ変換部の機能を停止させるラッチ信号を外部
より供給するためのラッチ端子を設けたことを特徴とす
るデジタル温度補償圧電発振器。 1. A temperature sensor section and an output from the temperature sensor section
Analog that inputs the analog temperature signal that has been input and performs A / D conversion
The digital / digital converter and the analog / digital converter
The digital temperature signal output from
Memory and the digital temperature output from the memory
Input the digital compensation signal corresponding to the signal and perform D / A conversion
Digital / analog conversion unit and the digital / analog
Control by supplying the analog compensation signal output from the converter
Temperature Compensated Piezoelectric Comprised of VCXO
In the oscillator, the analog / digital converter and the digital / analog
The conversion unit includes the analog / digital conversion unit and the digital unit.
/ External latch signal to stop the function of analog converter
It is characterized by providing a latch terminal for more supply
Digital temperature-compensated piezoelectric oscillator.
されたアナログ温度信号を入力しＡ／Ｄ変換するアナロ
グ／デジタル変換部と、該アナログ／デジタル変換部か
ら出力されたデジタル温度信号をアドレスとして供給さ
れるメモリと、該メモリから出力される該デジタル温度
信号に対応するデジタル補償信号を入力しＤ／Ａ変換す
るデジタル／アナログ変換部と、該デジタル／アナログ
変換部からの出力されたアナログ補償信号を供給し制御
されるＶＣＸＯとより構成されるデジタル温度補償圧電
発振器において、外部からの自動周波数制御信号を該Ｖ
ＣＸＯに供給するＶＣ端子、及び該ＶＣ端子に接続し、
該自動周波数制御信号の入力を感知すると、該アナログ
／デジタル変換部及びデジタル／アナログ変換部に所定
時間該アナログ／デジタル変換部及びデジタル／アナロ
グ変換部をラッチさせるラッチ信号を供給するセンシン
グ回路を設けたことを特徴とするデジタル温度補償圧電
発振器。 2. A temperature sensor section and an output from the temperature sensor section
Analog that inputs the analog temperature signal that has been input and performs A / D conversion
The digital / digital converter and the analog / digital converter
The digital temperature signal output from
Memory and the digital temperature output from the memory
Input the digital compensation signal corresponding to the signal and perform D / A conversion
Digital / analog conversion unit and the digital / analog
Control by supplying the analog compensation signal output from the converter
Temperature Compensated Piezoelectric Comprised of VCXO
In the oscillator, an automatic frequency control signal from the outside is applied to the V
A VC terminal supplied to the CXO and connected to the VC terminal,
When the input of the automatic frequency control signal is sensed, the analog
Predetermined for digital / digital converter and digital / analog converter
Time analog / digital converter and digital / analog
Sensing for supplying a latch signal for latching the converter
Temperature-compensated piezoelectric characterized by the provision of a switching circuit
Oscillator.
されたアナログ温度信号を入力しＡ／Ｄ変換するアナロ
グ／デジタル変換部と、該アナログ／デジタル変換部か
ら出力されたデジタル温度信号をアドレスとして供給さ
れるメモリと、該メモリから出力される該デジタル温度
信号に対応するデジタル補償信号を入力しＤ／Ａ変換す
るデジタル／アナログ変換部と、該デジタル／アナログ
変換部から の出力されたアナログ補償信号を供給し制御
されるＶＣＸＯとより構成され、移動局用発振器として
使用するデジタル温度補償圧電発振器において、基地局
からの自動周波数制御信号を該ＶＣＸＯに供給するＶＣ
端子、及び該ＶＣ端子に接続し、該自動周波数制御信号
の入力を感知すると、該アナログ／デジタル変換部及び
デジタル／アナログ変換部に、移動局が信号を送信する
時間及び移動局が信号を受信する時間、該アナログ／デ
ジタル変換部及びデジタル／アナログ変換部をラッチさ
せるラッチ信号を供給するセンシング回路を設けたこと
を特徴とするデジタル温度補償圧電発振器。 3. A temperature sensor section and an output from the temperature sensor section
Analog that inputs the analog temperature signal that has been input and performs A / D conversion
The digital / digital converter and the analog / digital converter
The digital temperature signal output from
Memory and the digital temperature output from the memory
Input the digital compensation signal corresponding to the signal and perform D / A conversion
Digital / analog conversion unit and the digital / analog
Control by supplying the analog compensation signal output from the converter
As a mobile station oscillator
In the digital temperature compensation piezoelectric oscillator used, the base station
Which supplies the automatic frequency control signal from the VC to the VCXO
Terminal, and the automatic frequency control signal connected to the VC terminal
Senses the input of the analog / digital converter and
Mobile station sends signal to digital / analog converter
Time and time at which the mobile station receives the signal, the analog / data
The digital conversion section and digital / analog conversion section are latched.
A sensing circuit that supplies a latch signal
A digital temperature-compensated piezoelectric oscillator characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29072994A JP3399669B2 (en) | 1994-10-31 | 1994-10-31 | Digital temperature compensated piezoelectric oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29072994A JP3399669B2 (en) | 1994-10-31 | 1994-10-31 | Digital temperature compensated piezoelectric oscillator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08130412A JPH08130412A (en) | 1996-05-21 |
| JP3399669B2 true JP3399669B2 (en) | 2003-04-21 |
Family
ID=17759775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29072994A Expired - Fee Related JP3399669B2 (en) | 1994-10-31 | 1994-10-31 | Digital temperature compensated piezoelectric oscillator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3399669B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117978193A (en) * | 2023-12-27 | 2024-05-03 | 西安电子科技大学 | A method and circuit for digital temperature compensation of wake-up receiver |
-
1994
- 1994-10-31 JP JP29072994A patent/JP3399669B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08130412A (en) | 1996-05-21 |
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