Voltage comparator with controlled output current proportional t

Details Voltage comparator with controlled output current proportional t Voltage comparator with controlled output current proportional t

1993-07-21

1996-12-10

Wong, Peter S.

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

327 73, 327109, 327563, G05F 316

Patent

active

055834256

ABSTRACT:
A voltage comparator produces a current output as a function of the differential input voltage. Three transfer functions are detailed. In the linear transfer mode the output varies linearly in the transition region and swings between zero and a well-defined current value. In a truncated response mode, the output is zero for zero differential input voltage, remains at zero for one input voltage polarity, and rises for the other polarity input linearly to a well-defined current value. In the folded response mode the output current is zero for zero differential input and rises linearly in the transition region to a well-defined current value for either polarity of differential input. While a CMOS form of construction is preferred, bipolar construction is also shown.

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M. Rybicki, "A Push Pull Transconductance Amplifier with Extended Power Supply and Common Mode Range", Motorola Technical Developments, vol. 9, (Aug. 1989) pp. 58-59.
Chung-Yu Wu et al. "New Fully Differential HF CMOS OP AMP's with Efficient Common Mode Feedback", 1989 IEEE International Symposium on Circuits and Systems, vol. 3, (May 1989) pp. 2076-2079.
J. Fisher "A Highly Linear CMOS Buffer Amplifier", IEEE Journal of Solid-State Circuits, vol. SC-22, No. 3 1987 pp. 330-332 (pp. 333-334 still not found).
D. Senderowicz et al. "PCM Telephony: Reduces Architecture for D/A Converter and Filter Combination" IEEE Journal of Solid-State Circuits, vol. 25, No. 4 (Aug. 1990) pp. 987-995.

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