Replica cell for ring oscillator

Details Replica cell for ring oscillator Replica cell for ring oscillator

2005-10-11

2005-10-11

Shingleton, Michael B. (Department: 2817)

Oscillators

Ring oscillators

C331S008000, C331S017000, C331S034000, C331S175000, C331S17700V, C331S185000, C331S186000, C327S156000, C327S538000, C327S543000

Reexamination Certificate

active

06954110

ABSTRACT:
In some embodiments, a ring oscillator includes a plurality of delay cells coupled in series as a ring, and a replica cell coupled to the delay cells to provide at least one bias signal to the delay cells. The replica cell includes a differential transistor pair formed of a first transistor and a second transistor. The first transistor has a drain terminal and a gate terminal coupled to the drain terminal. The second transistor has a drain terminal and a gate terminal coupled to the drain terminal of the second transistor.

REFERENCES:
patent: 5936476 (1999-08-01), Iravani
patent: 2001/0043123 (2001-11-01), Yabe

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