Logic gate with controllable hysteresis and high frequency volta

Details Logic gate with controllable hysteresis and high frequency volta Logic gate with controllable hysteresis and high frequency volta

1995-06-06

1997-01-14

Westin, Edward P.

Electronic digital logic circuitry

Signal sensitivity or transmission integrity

Input noise margin enhancement

326 83, 327206, H03K 1716, H03K 19094

Patent

active

055943616

ABSTRACT:
A hysteresis circuit comprises a first logic section, a second logic section cascaded with the first logic section, and circuitry for controlling hysteresis threshold voltages of the hysteresis circuit. The hysteresis controlling circuitry conducts current from a source of a first supply voltage to the output lead of the first logic section during a low-to-high transition of an input voltage on an input terminal of the hysteresis circuit. The hysteresis controlling circuitry conducts current from the output lead of the first logic section to a source of a second supply voltage during a high-to-low transition of the input voltage on the input terminal of the hysteresis circuit. A clock generator integrated circuit chip employing the hysteresis circuit in a voltage controlled oscillator can generate squarewave signals of 150 MHz onto a plurality of output terminals when powered from approximately 3.3 volts throughout a 0 to 70 degree Celsius temperature range, a clock skew of less than 0.5 nanosecond existing between the squarewave signals on the output terminals.

REFERENCES:
patent: 4539489 (1985-09-01), Vaughn
patent: 4571504 (1986-02-01), Iwamoto et al.
patent: 4603264 (1986-07-01), Nakano
patent: 5122680 (1992-06-01), Stakely et al.
patent: 5334883 (1994-08-01), Rosenthal
patent: 5386153 (1995-01-01), Voss et al.
patent: 5461331 (1995-10-01), Schorn

Affiliated with

Also associated with

Rating

Logic gate with controllable hysteresis and high frequency volta does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Logic gate with controllable hysteresis and high frequency volta, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Logic gate with controllable hysteresis and high frequency volta will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1390967