Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By amplitude
Patent
1997-04-30
1998-10-27
Wells, Kenneth B.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific signal discriminating without subsequent control
By amplitude
327 65, 327206, 327362, 330260, 330261, H03K 522
Patent
active
058282424
ABSTRACT:
A comparator with a built-in offset is disclosed. The comparator includes a bias current circuit, a differential input stage with the built-in offset, and a hysteresis circuit. The built-in offset is generated by using a resistor in the differential input stage of the comparator such that the resistor is driven by the bias current as well as the current generated by the hysteresis circuit. Additionally, a reset circuit which uses the comparator with the built-in offset is described. The reset circuit uses a voltage divider circuit to divide a first input voltage to the comparator. A band-gap voltage reference is used to provide a second input voltage to the comparator. Therefore, the reset circuit generates a reset signal when the divided voltage reaches the value of the band-gap voltage plus the offset. In another embodiment, a comparator having a differential input stage, an output stage, and a bias circuit with a hysteresis circuit is disclosed. The hysteresis circuit selectively applies a bias voltage to the differential input stage to achieve the hysteresis.
REFERENCES:
patent: 3764826 (1973-10-01), Okada
patent: 4324990 (1982-04-01), Gay
patent: 4406955 (1983-09-01), Lo Cascio
patent: 4456840 (1984-06-01), Ide et al.
patent: 4535294 (1985-08-01), Ericksen et al.
patent: 4634905 (1987-01-01), Campbell, Jr.
patent: 4694198 (1987-09-01), Umeki
patent: 4806791 (1989-02-01), Mizuide
patent: 4935719 (1990-06-01), McClure
patent: 4972517 (1990-11-01), Kondou et al.
patent: 5039888 (1991-08-01), Bell et al.
patent: 5070295 (1991-12-01), Morigami
patent: 5140187 (1992-08-01), Schwob
patent: 5177376 (1993-01-01), Wellnitz
patent: 5182471 (1993-01-01), Yoshida
patent: 5223743 (1993-06-01), Nakagawara
patent: 5264740 (1993-11-01), Wright
patent: 5274275 (1993-12-01), Colles
patent: 5289054 (1994-02-01), Lucas
patent: 5319347 (1994-06-01), McClure
patent: 5334883 (1994-08-01), Rosenthal
patent: 5357235 (1994-10-01), McClure
patent: 5369319 (1994-11-01), Good et al.
patent: 5400007 (1995-03-01), McClure
patent: 5446396 (1995-08-01), Brehmer
patent: 5587674 (1996-12-01), Danstrom
Galanthay Theodore E.
Jorgenson Lisa K.
Larson Renee M.
SGS-Thomson Microelectronics Inc.
Wells Kenneth B.
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