JPS6342356B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic bubble memory device, and in particular,
The coil drive voltage is controlled by detecting the temperature of the magnetic bubble memory device (hereinafter referred to as the device),
This paper relates to improvements in temperature-compensated power supplies for stable device operation.

In a magnetic bubble memory device, a current is passed through a magnetic bubble control coil surrounding the device, and the movement of the magnetic bubble is controlled by the generated magnetic field, but the optimum coil control current varies depending on the temperature of the device. Furthermore, since the temperature of the device increases when it is operated, it is necessary to supply a coil current according to the temperature of the device in order to ensure stable operation.

[Conventional technology]

Conventionally, for temperature compensation, a temperature detector is installed close to the device in the equipment, and its output is input to the temperature compensation power supply, and a correction voltage according to the preset temperature-voltage characteristics is used for magnetic bubble control. The voltage is applied to the coil for use.

However, the device heats up as you use it,
The temperature will be different from that of an unused device. In magnetic bubble memory devices that are designed to increase memory capacity by mounting multiple devices, temperature detectors are installed in the atmosphere close to multiple devices.
A correction voltage corresponding to the temperature of the device during operation is not applied, which impedes stable operation, and improvements are desired.

FIG. 4 is a circuit diagram showing the arrangement of a conventional temperature sensor and devices.
A thermistor temperature detector 2 is placed near the n.
temperature sensor 2 is installed, and the output of the temperature sensor 2 is
Input to DC/DC converter 3 (power supply),
The force of a differential amplifier (not shown) in the DC/DC converter 3 is applied to the device drive coil 5 to control the movement of the magnetic bubble.

[Problem that the invention seeks to solve]

In the conventional temperature compensation method described above, the temperature of the atmosphere is detected rather than the temperature of each individual device during operation, and the voltage applied to the drive coil of the device is corrected. There was a problem that the optimum correction was not made due to the difference.

[Means for solving problems]

The present invention provides a magnetic bubble memory device that solves the above problems, and its means include providing temperature detectors for each of a plurality of devices in the device,
This is done by switching the output of the temperature detector in synchronization with device selection and controlling the coil drive voltage.

[Effect]

In the above magnetic bubble memory device, a temperature detector is arranged for each device, and the temperature detector is switched in synchronization with the operation switching of multiple devices, so the temperature of the device in operation is constantly detected. The optimum voltage is always applied to the drive coil of the device.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a configuration diagram showing the arrangement of the temperature sensor and devices of the present invention, in which a plurality of devices 1a to 1 in the apparatus are shown.
Thermal compound (thermal conductive adhesive) on 1n
The same number of thermistor temperature detectors 2a to 2n as the devices are installed, which are closely attached to each other and fixed with metal fittings or the like, and are connected to the DC/DC converter 3 via a switch 6.

FIG. 2 is a circuit diagram for explaining how to connect the output of the temperature detector and the power supply. One circuit of the switch 6 is closed by the device select signal, and the resistors 7 and 8 of that circuit and the thermistor temperature detector 2a are connected. but
Connected to DC/DC converter 3 (power supply).

Terminal 4 of the DC/DC converter 3 is connected to a differential amplifier (not shown) in the DC/DC converter 3, and the voltage divided by the resistor 7, thermistor temperature detector 2a, and resistor 8 is sent to the differential amplifier. applied. However, since the thermistor's resistance value changes depending on the temperature, the divided voltage also changes.
It is input to the differential amplifier in the DC/DC converter 3. A temperature-corrected voltage is applied from the differential amplifier to the drive coil 5 of the operating device 1a via a coil drive circuit (not shown) to control the movement of the magnetic bubble.

In a magnetic bubble memory device including a plurality of devices, there is a device select signal for switching the operation of the devices, and when this signal is input to the switch 6, the device 1a and the temperature sensor 2a can be switched synchronously.

Figure 3 is a circuit diagram for explaining another embodiment in which the thermistor temperature detector and the differential amplifier in the DC/DC converter are connected, whereas the resistor 8 in Figure 2 is provided individually. , except that the resistor 9 is connected in common, operates roughly the same as in FIG. 2.

〔Effect of the invention〕

As explained above, according to the present invention, a temperature detector is arranged for each device, and the temperature detector can be switched in synchronization with the operation switching of multiple devices, so that the temperature of the device that is constantly in operation can be used to control the temperature. This voltage is supplied to the drive coil of the device, resulting in stable operation.

[Brief explanation of drawings]

Fig. 1 is a configuration diagram showing the arrangement of the temperature sensor and devices of the present invention, Fig. 2 is a circuit diagram for explaining how to connect the output of the temperature sensor and the power supply, and Fig. 3 is a diagram showing the arrangement of the temperature sensor and the device. A circuit diagram for explaining another embodiment connected to a differential amplifier in a DC/DC converter, and FIG. 4 is a configuration diagram showing the arrangement of a conventional temperature detector and devices. In the figure, 1 is a magnetic bubble memory device;
2 is a temperature detector, 3 is a DC/DC converter, 4 is a differential amplifier terminal, 5 is a coil, 6 is a switch,
7, 8, and 9 indicate resistance, respectively.

Claims (1)

[Claims] 1. A magnetic bubble memory device comprising a plurality of magnetic bubble memory devices and a temperature detector, wherein the output of the temperature detector is input to a coil drive power source of the magnetic bubble memory device, and the voltage of the coil drive power source is controlled. Temperature detectors corresponding to each of the plurality of magnetic bubble memory devices are provided, and outputs of the plurality of temperature detectors are switched and inputted to the coil drive power supply in synchronization with selection of the magnetic bubble memory device. A magnetic bubble memory device featuring: