I.sup.2l sensing circuit with increased sensitivity

Details I.sup.2l sensing circuit with increased sensitivity I.sup.2l sensing circuit with increased sensitivity

H - Electricity

03

K

328/167

H03K 19/20 (2006.01) H03K 3/288 (2006.01)

Patent

CA 1134464

KENT F. SMITH GI-SLC-154 I2L SENSING CIRCUIT WITH INCREASED SENSITIVITY ABSTRACT OF THE DISCLOSURE An I2L circuit is provided for sensing relatively small differences in magnitude between two input signals. A dual input bistable circuit generates an output representative of the degree to which each of the bistable circuit inputs is actuated, subsequent to the energization of the bistable circuit by a current source in the form of an injector transistor, which is disabled to reset the bistable circuit. A pair of load transistors are provided, the control terminals of which are, respectively, connected to receive the input signals. Each load transistor serves to actuate a different one of the bistable means inputs to a degree dependent upon the conductivity thereof, which, in turn, is dependent upon the magnitude of the input signal connected thereto. The load transistors also serve to isolate the source of the input signals from the energizing injector current, to prevent the sensing circuit from disrupting the state of the source of the input signals.

347708

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