Differential amplifier having a reduced current dissipation

Details Differential amplifier having a reduced current dissipation Differential amplifier having a reduced current dissipation

1998-06-30

2000-08-15

Kim, Jung Ho

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327 53, 327 89, H03K 522

Patent

active

061042161

ABSTRACT:
A differential circuit used in an input interface of a memory device comprises a current mirror including a pair of P-channel transistors, a differential pair including a pair of N-channel transistors for receiving a reference voltage and an input signal voltage, respectively, and another N-channel transistor connected between the common sources of the pair of N-channel transistors and GND line. The another N-channel transistor has a gate maintained at a constant potential irrespective of the fluctuations of the source voltage, thereby suppressing a current increase due to variations of the source voltage and reference voltage. The constant voltage is generated in the memory device itself and used for another purpose.

REFERENCES:
patent: 4642489 (1987-02-01), Wilcox
patent: 5343086 (1994-08-01), Fung et al.
patent: 5488322 (1996-01-01), Kaplinsky

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