JPS6045382B2 - electronic clock - Google Patents
electronic clockInfo
- Publication number
- JPS6045382B2 JPS6045382B2 JP53019391A JP1939178A JPS6045382B2 JP S6045382 B2 JPS6045382 B2 JP S6045382B2 JP 53019391 A JP53019391 A JP 53019391A JP 1939178 A JP1939178 A JP 1939178A JP S6045382 B2 JPS6045382 B2 JP S6045382B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- section
- power supply
- channel mos
- mos transistor
- 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
Links
- 230000010355 oscillation Effects 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000013078 crystal Substances 0.000 claims description 3
- 230000000295 complement effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 6
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G19/00—Electric power supply circuits specially adapted for use in electronic time-pieces
- G04G19/02—Conversion or regulation of current or voltage
- G04G19/06—Regulation
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electric Clocks (AREA)
- Electromechanical Clocks (AREA)
- Dc-Dc Converters (AREA)
Description
【発明の詳細な説明】
本発明は、発振部、分周部、表示駆動装置及ひ表示装
置を有し、且つ供給電源系が電源電圧（例えは電池電圧
）と電圧変換部によつて電源電圧を低下させた低電圧部
との２電源系からなる、コンプリメンタリーＭ０５トラ
ンジスタ（以下ＣＭＯＳＴと略す）を用いた水晶発振式
電子時計に関するものて、電圧変換部の電圧低下部分が
抵抗とＮチャネルＭＯＳトランジスタのドレイン、ソー
ス間抵抗の並列抵抗よりなり、該ＮチャネルＭＯＳＩ−
ランジスタが、境界電圧以上でオフ、境界電圧以下でオ
ンすることにより、動作上必要な最低電圧で回路を動作
させ、電子時計の消費電力を減少せしめんとするもので
ある。DETAILED DESCRIPTION OF THE INVENTION The present invention has an oscillation section, a frequency division section, a display driving device, and a display device, and a power supply system that uses a power supply voltage (for example, a battery voltage) and a voltage conversion section to generate a power source. Regarding a crystal oscillation type electronic watch using a complementary M05 transistor (hereinafter abbreviated as CMOST), which consists of a two-power supply system with a low voltage part that reduces the voltage, the voltage reduction part of the voltage converter has a resistor and an N-channel It consists of a parallel resistance between the drain and source of a MOS transistor, and the N-channel MOS
By turning off the transistor when the voltage is above the boundary voltage and turning on when the voltage is below the boundary voltage, the circuit is operated at the lowest voltage necessary for operation, thereby reducing the power consumption of the electronic watch.
本発明に用いている電子時計のブ泪ツクダイアグラム
を第１図に、電圧変換部の説明を第２図に、電圧変換部
の一実施例の回路図を第３図に示した。A book diagram of the electronic timepiece used in the present invention is shown in FIG. 1, an explanation of the voltage converter is shown in FIG. 2, and a circuit diagram of one embodiment of the voltage converter is shown in FIG.
第１図において、発振部１、分周部２、表示駆動部３、
表示装置４、電圧変換部５、電源７てあり、電源７の１
電圧端子をＶＤＤ）Θ電圧端子をＶｓｓとし、電源電圧
は、電圧変換部５を介して、低電圧Ｖ。。Ｌを得て、破
線内の電子回路８にはＶＤＤを共通として、Ｖ。。及び
り。。Ｌの２電源が供給されている。ＣＭＯＳＴによる
電子回路は、一般的に電池電圧て動作させる場合、ＩＶ
程度以上で完全な動作を保証している。したがつて、エ
ネルギーの必要な表示駆動装置３などを除いて、他の電
子回路には、必要最低限の電圧が印加されれば良いわけ
で、本発明は、電圧変換部４を介して、１．６Ｖ程度の
電池から効率良く、ＩＶ程度の安定な低電圧を供給し、
消費電力の減少を実現し−Ｃいる。すなみにＣＭＯＳＴ
の消費電力Ｐは次式（１）て示されるので Ｐ＝Ｃ０Ｖ
２ｓｓｆ・・・・・・・・・・・・（１）Ｃｏ：寄生容
量Ｖ。In FIG. 1, an oscillating section 1, a frequency dividing section 2, a display driving section 3,
There is a display device 4, a voltage converter 5, a power supply 7, and one of the power supplies 7
The voltage terminal is set to VDD) and the Θ voltage terminal is set to Vss, and the power supply voltage is converted to a low voltage V via the voltage converter 5. . L is obtained, and VDD is common to the electronic circuit 8 within the broken line. . Andri. . Two power supplies (L) are supplied. Generally, when operating a CMOST electronic circuit using battery voltage, IV
Perfect operation is guaranteed above a certain level. Therefore, except for the display driving device 3 which requires energy, it is sufficient to apply the minimum necessary voltage to other electronic circuits. Efficiently supplies stable low voltage of about IV from a battery of about 1.6V,
Achieves reduction in power consumption. By the way, CMOST
The power consumption P is shown by the following formula (1), so P=C0V
2ssf・・・・・・・・・・・・(1) Co: Parasitic capacitance V.
、：電源電圧ｆ：動作周波数
１Ｖ動作をさせると、１．６Ｖ動作の４．０％のエネ
ルギーで済むことになる。, : power supply voltage f: operating frequency When operating at 1V, 4.0% of the energy required for 1.6V operation is required.
以下、電圧変換部５について、図面に従つて詳細に説明
する。第２図において、破線内が電圧変換部５であり、
それは、境界電圧部５１と電圧低下部５２で構成され、
低下した電圧端子■Ｓｓしと■ＤＤ間に負荷である低電
圧部６が接続されている。具体的な一実施例である第３
図において、電圧変換部のうち境界電圧部５１は、ＰＭ
ＯＳＴ５ｌｌ、ＮＭＯＳＴ５ｌ３、抵抗５１２、抵抗５
１４そして電圧低下部５２はＮＭＯＳＴ５２ｌ、抵抗５
２２よりなる。ここでの抵抗はＮＭＯＳＴあいはＰＭＯ
ＳＴを用いても良いし、Ｐ型不純物の薄い領域、即ちＰ
ウェルと同時に拡散してできる拡散抵抗を用いても良い
。ＰＭＯＳＴ５ｌｌは、ソースＳを■。ｏに、ゲートＧ
及びドレインＤは共通接続され抵抗５１２を介してＶｓ
ｓに接続し、さらにＰＭＯＳＴ５ｌｌのドレインＤはＮ
ＭＯＳＴ５ｌ４のゲートＧと接続する。またＮＭＯＳＴ
５ｌ４のソースＳは■Ｓｓに、ドレインＤは境界電圧端
子Ｖｓとなり、ＮＭＯＳＴ５２ｌのゲートＧの入力とな
るとともに抵抗５１３を介してＶＤＤに接続される。電
圧低下部５２は抵抗５２２とＮＭＯＳＴ５２ｌが並列接
続され、低電圧部６とＶ８間に入る。このとき、境界電
圧■，が電源電圧Ｖｓｓによつてどう変化するかを考え
てみる。ＰＭＯＳＴ５ｌｌのドレインＤの電圧は、抵抗
５１２がＰＭＯＳＴ５ｌｌのオン抵抗に比較して十分大
きけれは、ほぼＰＭＯＳＴ５ｌｌのしきい電圧■Ｐ５ｌ
ｌとなる。したがつてＮ〜１０ＳＴ５１４のゲートＧ−
Ｖｓｓ間の電圧がＶＰ５，，とＮＭＯＳＴ５ｌ４のしき
い電圧ＶＮ５ｌ４の和より大きいときはＮＭＯＳＴ５ｌ
４はオンとなつて■，は■，ｓとなり、また■，５１１
＋ＶＮ５ｌ４より小さいときはオフとなりＶＤＤとなる
。ただしこの仮定では符号を省略し、大きさだけを考え
ている。実際的に述べるとＶＰ５ｌｌ＝ー０．５Ｖ１■
Ｎ５ｌ４＝０．５Ｖとしたとき、ＮＭＯＳＴ５ｌ４は電
源電圧１Ｖｓｓ１がＩＶＰ５ｌｌｌ＋１ＶＮ５１４１＝
１．０Ｖ以上でオン、以下でオフとなる。したがつて■
，を入力とする電圧低下部のＮＭＯＳＴ５２ｌは、逆に
１Ｖ以上でオフ、１■以下でオンとなる。この結果、電
源電圧が１■以上のときは、抵抗５２２を介して、電圧
を低下させ低電圧部６に加わり、１Ｖ以下になるとＮＭ
ＯＳＴ５２ｌの十分に小さいオン抵抗により短絡されて
、電圧は、低下することなしに低電圧部６に加わるわけ
である。このように本発明によれば、電源電圧が境界電
圧より高いときは、抵抗によつて電圧を低下させ、電圧
が低くなつてときは、ダイレクトに負荷に電圧を加える
ことによつて、低電圧部での動作を安定させながら、消
費電力の減少を実現し、その効果は非常に大きなものが
ある。The voltage converter 5 will be described in detail below with reference to the drawings. In FIG. 2, the area inside the broken line is the voltage converter 5,
It is composed of a boundary voltage section 51 and a voltage drop section 52,
A low voltage section 6, which is a load, is connected between the reduced voltage terminals Ss and D. The third example is a specific example.
In the figure, a boundary voltage section 51 of the voltage conversion section is composed of PM
OST5ll, NMOST5l3, resistor 512, resistor 5
14 and the voltage drop part 52 is NMOST52l, resistor 5
Consists of 22. The resistance here is NMOST or PMO
ST may be used, or a thin region of P-type impurity, that is, P
A diffused resistor formed by diffusion at the same time as the well may also be used. PMOST5ll uses the source S as ■. o, gate G
and the drain D are commonly connected to Vs through a resistor 512.
s, and the drain D of PMOST5ll is connected to N
Connect to gate G of MOST5l4. Also NMOST
The source S of the NMOST 514 becomes the Ss, the drain D becomes the boundary voltage terminal Vs, which becomes an input to the gate G of the NMOST 52l, and is connected to the VDD via the resistor 513. The voltage drop section 52 has a resistor 522 and an NMOST 52l connected in parallel, and is placed between the low voltage section 6 and V8. At this time, let us consider how the boundary voltage ■ changes depending on the power supply voltage Vss. If the resistor 512 is sufficiently large compared to the on-resistance of PMOST5ll, the voltage at the drain D of PMOST5ll is approximately equal to the threshold voltage of PMOST5ll ■P5l
It becomes l. Therefore, the gate G- of N~10ST514
When the voltage between Vss is larger than the sum of VP5,, and the threshold voltage VN5l4 of NMOST5l4, NMOST5l
4 turns on and ■, becomes ■,s, and again ■,511
When it is smaller than +VN5l4, it is turned off and becomes VDD. However, in this assumption, the sign is omitted and only the size is considered. Practically speaking, VP5ll=-0.5V1■
When N5l4=0.5V, NMOST5l4 has a power supply voltage of 1Vss1 as IVP5lll+1VN5141=
It turns on when it is 1.0V or more, and turns off when it is less than 1.0V. Therefore■
, is input to the voltage lowering section NMOST 52l, which is turned off when the voltage is 1V or more and turned on when it is 1V or less. As a result, when the power supply voltage is 1V or more, the voltage is reduced through the resistor 522 and applied to the low voltage section 6, and when it becomes 1V or less, NM
Due to the sufficiently small on-resistance of the OST 52l, the voltage is applied to the low voltage section 6 without dropping. As described above, according to the present invention, when the power supply voltage is higher than the boundary voltage, the voltage is lowered by the resistor, and when the voltage becomes low, the voltage is applied directly to the load, thereby lowering the voltage. This reduces power consumption while stabilizing the operation of the parts, and the effect is very significant.
第１図は本発明に用いている２電源系からなる水晶発振
式電子時計のブロックダイアグラム、第２図は電圧変換
部の説明図、第３図は本発明の電圧変換部の具体的な一
実施例を示す回路図。
１・・・・・・発振部、２・・・・・・分周部、３・・
・・・・表示駆動部、４・・・・・・表示装置、５・・
・・・・電圧変換部、６・・・低電圧部、７・・・・・
・電源（例えば電池）、５１・・・境界電圧部、５２・
・・・・・電圧低下部、５１１・・・ＰＭＯＳＴｌ５ｌ
４，５２ｌ・・・・・・ＮＭＯＳＴｌ５ｌ２，５ｌ３，
５２２・・・・・・抵抗。Fig. 1 is a block diagram of a crystal oscillation electronic timepiece consisting of two power supply systems used in the present invention, Fig. 2 is an explanatory diagram of the voltage converter, and Fig. 3 is a concrete diagram of the voltage converter of the present invention. A circuit diagram showing an example. 1... Oscillation section, 2... Frequency division section, 3...
...Display drive unit, 4...Display device, 5...
...Voltage converter section, 6...Low voltage section, 7...
- Power source (e.g. battery), 51... Boundary voltage section, 52.
...Voltage drop section, 511...PMOSTl5l
4,52l...NMOSTl5l2,5l3,
522...Resistance.
Claims (1)
、且つ供給電源系が電源電圧系と電圧変換部によつて電
源電圧を低下させた低電圧系との２電源系からなる、コ
ンプリメンタリーＭＯＳトランジスタを用いた水晶発振
式電子時計において、電圧変換部はＮチャネルＭＯＳト
ランジスタのドレインソース間に並列に接続した抵抗よ
りなる電圧低下部とＰチャネルＭＯＳトランジスタのド
レインに直列接続された抵抗と該ＰチャネルＭＯＳトラ
ンジスタのゲートと該抵抗の接続部にゲートが接続され
たＮチャネルＭＯＳトランジスタと該ＮチャネルＭＯＳ
トランジスタのドレインに直列接続された抵抗とよりな
る境界電圧部とからなる供給電源部を有することを特徴
とする電子時計。1. It has an oscillation section, a frequency dividing section, a display driving device, and a display device, and the supply power system consists of two power supply systems: a power supply voltage system and a low voltage system in which the power supply voltage is lowered by a voltage conversion section. In a crystal oscillation type electronic watch using complementary MOS transistors, the voltage conversion section includes a voltage drop section consisting of a resistor connected in parallel between the drain and source of an N-channel MOS transistor, and a resistor connected in series with the drain of a P-channel MOS transistor. and an N-channel MOS transistor whose gate is connected to a connection between the gate of the P-channel MOS transistor and the resistor, and the N-channel MOS transistor.
An electronic timepiece characterized in that it has a power supply section consisting of a boundary voltage section and a resistor connected in series to the drain of a transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53019391A JPS6045382B2 (en) | 1978-02-22 | 1978-02-22 | electronic clock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53019391A JPS6045382B2 (en) | 1978-02-22 | 1978-02-22 | electronic clock |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54112680A JPS54112680A (en) | 1979-09-03 |
| JPS6045382B2 true JPS6045382B2 (en) | 1985-10-09 |
Family
ID=11997976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP53019391A Expired JPS6045382B2 (en) | 1978-02-22 | 1978-02-22 | electronic clock |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6045382B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4868346B2 (en) * | 2005-08-10 | 2012-02-01 | 大阪シーリング印刷株式会社 | Cutter roller, method for producing long film with cut and method for producing bag with cut |
-
1978
- 1978-02-22 JP JP53019391A patent/JPS6045382B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54112680A (en) | 1979-09-03 |
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