Chopper comparator showing high speed and low power operations f

Details Chopper comparator showing high speed and low power operations f Chopper comparator showing high speed and low power operations f

1997-09-22

1999-09-28

Tran, Toan

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327 93, 327337, H03K 5153, G06G 764

Patent

active

059594691

ABSTRACT:
A chopper comparator for comparing an analog input signal voltage and a comparative reference voltage comprises the following elements. First and second input terminals are provided for receiving the analog input signal voltage and the comparative reference voltage respectively. A first capacitor is provided with a first input side terminal connected through a first switch to the first input terminal. A second capacitor is provided with a second input side terminal connected through a second switch to the second input terminal. A data latch circuit is provided and is connected to first and second output terminals of the first and second capacitors. A third switch is provided between the first and second input side terminals of the first and second capacitors, wherein after the first and second switches have turned OFF to discontinue applications of the analog input signal voltage and the comparative reference voltage to the first and second capacitors respectively, the third switch turns ON to form a short circuit between the first and second input side terminals of the first and second capacitors.

REFERENCES:
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patent: 5262686 (1993-11-01), Kurosawa
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patent: 5546028 (1996-08-01), Yamaguchi
Lewis et al., "Session XVII: Analog Techniques" IEEE International Solid State Circuits Conference 30:210-211 and 405 (1987).
Matsuura et al., "Session XV: A/D conversion" IEEE International Solid State Circuits Conference 31:220-221 and 376 (1988).
Dingwall et al. IEEE Journal of Solid State Circuit, vol. SC-20, No. 6, Dec. 1985, pp. 1138-1143.

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