Digital ring oscillator

Details Digital ring oscillator Digital ring oscillator

2010-03-25

2011-12-06

Chang, Joseph (Department: 2817)

Oscillators

Ring oscillators

C327S161000

Reexamination Certificate

active

08072275

ABSTRACT:
A digital ring oscillator outputting a toggled clock signal. The clock signal is generated by a plurality of electronic cells that are arranged in series. At least one of the plurality of electronic cells receives a feedback of the clock signal. Control signals are received at an input for the plurality of electronic cells. Each electronic cell includes a first logic gate, a second logic gate, and an inverted logic gate coupled between the first logic gate and the second logic gate. For each electronic cell, a respective control signal controls whether an output signal received from the first logic gate of a preceding electronic cell is transferred through the first logic gate to the first logic gate in a succeeding electronic cell, or is inverted and transferred through the second logic gate to the second logic gate in a preceding electronic cell, based on the control signal.

REFERENCES:
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patent: 5699003 (1997-12-01), Saeki
patent: 6157267 (2000-12-01), Kakimura
patent: 6388484 (2002-05-01), Kamoshida et al.
patent: 6717479 (2004-04-01), Suda
patent: 2002/0171496 (2002-11-01), Jordan et al.
patent: 2010/0253298 (2010-10-01), Nonis et al.

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