JPS6151689A - Magnetic bubble cassette memory - Google Patents

Abstract

PURPOSE:To change over and use a cassette of 1Mb and 4Mb with interchangeability by installing a selecting circuit and a selecting terminal, selecting four magnetic bubble memory devices, changing over only a terminal group of one device and connecting to a connector pin. CONSTITUTION:A function current selector 51 and a sense selector 52 are composed of an analog switch, and a device is changed over by supplying a selecting signal from selecting terminals 49 and 50 to decoders 53 and 54, selecting and switching four devices and switching a terminal group belonging to one of the devices to terminals for connecting a connector 60, 70-100, 300, and 310-330. Thus, a cassette of 1Mb and 3Mb can be changed over and used at the same circuit with interchangeability and the number of connector pins can be incorporated into 17 pieces.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a magnetic bubble memory device, and in particular, it is capable of driving IMb and 4Mb 2a type magnetic bubble cassette memories (hereinafter referred to as cassettes) with a common circuit. The present invention relates to the structure of a cassette constructed as described above.

For convenient handling, magnetic bubble memory devices employ a cassette system in which a magnetic bubble memory device (hereinafter referred to as a device) is housed in a cassette and connected to a drive circuit via a cassette connector.

In such a cassette type magnetic bubble memory device,
It is possible to freely increase the storage capacity by exchanging multiple cassettes, but in this case, cassettes containing different types of devices, for example, a device with a storage capacity of 1 Mb, can be replaced with one cassette.
It is desired to provide compatibility so that the same circuit can drive a cassette with a storage capacity of 4 Mb and a cassette with a storage capacity of 4 Mb that stores 4 devices with a storage capacity of i4 Mb.

[Prior Art] - Fig. 3 is a diagram showing the terminals of a device connected to the connector pins of a conventional IMb and 4Mb cassette.

Figure 3 (al is a diagram showing the terminal of the device connected to the connector pin of the cassette containing one IMb device,
The connection terminals are 2 terminals for X coil terminal 1.2, 2 terminals for X coil terminal 3.4, and terminals 5 to 1 for function current.
6 terminals of 0, 5 terminals of sense terminals 29 to 33, total 1
It has 5 terminals.

Figure 3 (4M containing four bl I M b devices)
B This is a diagram showing the terminals of the device connected to the connector pins of the cassette, and the connecting terminals are two terminals, terminals 1 and 2 for the
The two terminals (terminal 3.4) for the X coil are the same as the IMb cassette, but the number of terminals for function current and sense is four times larger depending on the number of devices, so there are 24 terminals (terminals 5 to 28) for function current, and sense terminal. 29-48 20
There are a total of 48 terminals.

Therefore, it is necessary to use dedicated circuits to drive the IMb and 4Mb cassettes, or to use a 4-day connector for both sets so that they can be driven by the same circuit for compatibility. Then, the cassette became larger.

[Problem that the invention seeks to solve]

In the conventional cassette connector pin connection method described above, it is necessary to use a 48-pin connector in order to make the dual-power set compatible, which increases the size of the cassette.
There was a problem that this went against the trend of making the device more compact.

[Means for solving problems]

The present invention provides a connector pin connection method that solves the above problems.
This is accomplished by providing a select circuit and a select terminal (two terminals) for switching between the four devices, and by providing the same number of function current terminals and sense terminals as the four IMb devices connected to the connector pins.

[Effect]

In the above cassette connector pin connection method, IM
The B cassette does not have a select circuit and the select terminal is in a no-connection state, similar to the conventional IMb cassette, while the 4 Mb cassette supplies a select signal to the select terminal and selects four devices using the select circuit. By switching, it can be used in the same way as a conventional 4Mb power center, compatibility can be maintained between dual power sets with different numbers of devices, and the number of connector pins can be unified to 17.

〔Example〕

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

FIG. 1 is a diagram showing terminals of a device connected to connector pins of a cassette according to an embodiment of the present invention.

FIG. 1(a) is a diagram showing the terminals of a device connected to the connector pins of a cassette containing one IMb device.
The connection terminals are terminals 1 and 2 for the X coil, terminals 3 and 4 for the X coil, and terminals 5 to 1 for function current.
There are 17 terminals in total, including 6 terminals of 0, 5 terminals of sense terminals 29 to 35, and 2 terminals of select terminal 49.50 (no connection in IMb).

Figure 1 (bl is a diagram showing the terminals of the devices connected to the connector pins of the cassette containing four IMb devices,
There are 17 connection terminals in total: 2 terminals for the X coil (terminals 1 and 2), 2 terminals for the X coil (terminals 3 and 4), 6 terminals for the function current, 5 terminals for the sense terminal, and 2 terminals for the select terminal. A funxisine current selector 51 and a sense selector 52 are provided inside the cassette for receiving a select signal and selecting a device to be operated.

The function current selector 51 and the sense selector 52 are composed of analog switches, and to switch the devices, a select signal is supplied from the select terminal 49.50 to the decoder 53.54, and four devices are selectively switched. A group of terminals belonging to one device of 60.70.80.90
．． 100, 300, 310, 320, 330. Switch to . Note that the X coil terminals 1 and 2, the X coil terminals 3 and 4, the Gcom terminal 5 + scom terminal 29, and the select terminals 49 and 50 are common to the four devices.

FIG. 2 is a diagram for explaining another select circuit that switches terminal groups belonging to four IMb devices.

FIG. 2(a) shows the matrix method applied to switching the function current terminal group, in which the select signal is the select terminal 49. '50 is supplied to the base current supply power source and the base selector 55 to select the device, and for each terminal of the function current of the four devices, 4
One of the transistors 56-59 is selected to supply the base current, switching transistor 56 and connecting terminal 6 to terminal 60.

Figure 2 (b) LL applied to switching the sense terminal group
In the S circuit, four terminals 30.35. '40.45 is connected to the sense common terminal 29 via the resistor 66.

Select signal is sent from terminal 49.50 to pace selector 61
is applied to select the device and switch one of the four transistors 62-65, eg, transistor 62, for each terminal of the four device senses to connect terminal 30 to terminal 300.

〔Effect of the invention〕

As explained above, according to the present invention, a select circuit and a select terminal are provided, four devices are selected,
By connecting only one group of terminals of one device to the switching connector pins, both the IMb cassette and the 4Mb cassette can be made into co-pact and compatible cassettes.

[Brief explanation of drawings]

FIG. 1 is a diagram showing terminals of a device connected to connector pins of a cassette according to an embodiment of the present invention, FIG. 2 is a diagram illustrating another select circuit for switching terminal groups belonging to four IMb devices, FIG. 3 is a diagram showing terminals of devices connected to connector pins of conventional IMb and 4Mb outlets. In the figure, 1 to 4 are coil terminals, 5 to 28.60.70.80.90.100 are function current terminals, 29 to 48.300, 310. '320, 330. are sense terminals, 49 and 50 are select terminals, 5L 52 is a selector, 53 and 54 are decoders, 55 is a base current supply power supply and pace selector, 56
~59. 62 to 65 are transistors, 61 is a selector, and 66 is a resistor, respectively. Figure 1 (Q) @ 1 Figure 2 (Q) Figure 3 (Q)

Claims (1)

[Claims] One cassette includes at least one magnetic bubble memory device and a function current selection circuit and a sense selection circuit of the magnetic bubble memory device, and a function current terminal group and a sense terminal group belonging to one magnetic bubble memory device. A magnetic bubble cassette memory characterized in that only one of the bubbles is selected by the two selection circuits and connected to a connector pin connection terminal of the cassette.