Hysteresis limiter for canceling offset by dynamically varying a

Details Hysteresis limiter for canceling offset by dynamically varying a Hysteresis limiter for canceling offset by dynamically varying a

1997-03-26

1998-06-30

Tran, Toan

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Particular stable state circuit

327307, H03K 3037, H03L 500

Patent

active

057740046

ABSTRACT:
A hysteresis limiter including a hysteresis limiting circuit, a signal variance tracking device and a reference voltage selecting device can dynamically track variance of signals and adjust a reference voltage. The signal variance tracking device enters an offset tracking mode when there has not been any variance occurring in an output of the hysteresis limiting circuit for a predetermined period of time. In the offset tracking mode, the reference voltage selecting device continuously activates a change of the reference voltage until the output of the hysteresis limiting circuit becomes unstable. The unstable state implies that an offset is located, so treatment of the input signals can then be proceeded.

REFERENCES:
patent: 4616145 (1986-10-01), Myers
patent: 4707624 (1987-11-01), Yee
patent: 5040724 (1991-08-01), Brinkruff et al.
patent: 5122680 (1992-06-01), Stakely et al.
patent: 5166632 (1992-11-01), MacKenzie

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