G - Physics – 11 – C
Patent
G - Physics
11
C
352/81
G11C 7/00 (2006.01) G11C 27/02 (2006.01)
Patent
CA 1086426
ABSTRACT OF THE DISCLOSURE Disclosed is an analog voltage memory device comprising a differential amplifier for deriving the difference between two analog inputs, an operational amplifier to which are applied the output of the differential amplifier and the source follower voltage of a MOS type field-effect transistor, switching means interccnnected to the output terminal of the operational amplifier and the gate of the field-effect transis- tor, an output resistor interconnected between the source of the field-effect transistor and a negative power source or ground, and a nonpolarized capacitor interconnected between the gate of the field-effect transistor and a negative power source or ground, whereby the output voltage front the differential amplifier may be derived as the output voltage which is the source follower voltage of the field-effect transistor and is held. The analog voltage memory device may derive and hold the difference between two arbitrary analog inputs for a long time in a very simple manner and therefore has a dual function as an adder or subtractor and as an analog memory and finds very useful and wide applications in the fields of measuring instruments and medical appliances.
263136
Gowling Lafleur Henderson Llp
Matsushita Electric Industrial Co. Ltd.
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