Voltage comparator and A/D converter

Details Voltage comparator and A/D converter Voltage comparator and A/D converter

1997-08-19

1999-08-10

Tran, Toan

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327 93, 327337, H03K 5153

Patent

active

059364343

ABSTRACT:
An object is to obtain a voltage comparator capable of high-accuracy voltage comparison. An input voltage (VIN) and a reference voltage (VREF) are connected to one electrode of a capacitor (C1) through switches (S1) and (S2), respectively. The other electrode of the capacitor (C1) is connected to the input portion of an inverter (INV1). The output portion of the inverter (INV1) is connected to the input portion of an inverter (INV3) and is also fed back to the input through a switch (S3). An inverter (INV11) is further connected in parallel with the inverter (INV1), wherein the input/output characteristics of the inverters (INV1, INV3 and INV11) are set equal.

REFERENCES:
patent: 4197472 (1980-04-01), Aoki et al.
patent: 4989003 (1991-01-01), Sauer
patent: 5010338 (1991-04-01), Miki et al.
patent: 5165058 (1992-11-01), Nakatani et al.
patent: 5565800 (1996-10-01), Kobayashi
T. Kumamoto et al., "An 8-bit High-Speed CMOS A/D Converter," IEEE Journal of Solid-State Circuits, vol. sc-21, No. 6, Dec. 1986, pp. 976-982.

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