Controlled hysteresis comparator with rail-to-rail input

Details Controlled hysteresis comparator with rail-to-rail input Controlled hysteresis comparator with rail-to-rail input

2005-11-29

2005-11-29

Lam, Tuan T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

C327S205000, C327S206000

Reexamination Certificate

active

06970022

ABSTRACT:
Comparator circuits, including rail-to-rail comparator circuits, can implement inverter structures such as current-starved inverters to provide hysteresis to the comparator's output. For example, a current-starved inverter can have its input driven by the comparator output and add current to the currents produced by the comparator's input stage. The inverter current can be derived from bias sources used to bias the input stage of the comparator so that the inverter current can track the input stage bias currents.

REFERENCES:
patent: 4258272 (1981-03-01), Huang
patent: 5446396 (1995-08-01), Brehmer
patent: 6229346 (2001-05-01), Milanese et al.
patent: 6229350 (2001-05-01), Ricon-Mora
Hogervorst et al., “Design of Low-Voltage, Low-Power Operational Amplifier Cells,” 1996, pp. 165-167.

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