Techniques relating to oscillators

Details Techniques relating to oscillators Techniques relating to oscillators

2009-10-12

2011-10-11

Gannon, Levi (Department: 2817)

Oscillators

Ring oscillators

C331S186000, C327S158000, C327S277000, C327S280000

Reexamination Certificate

active

08035453

ABSTRACT:
An oscillator circuit includes differential variable delay circuits coupled together to form a ring oscillator. Each of the differential variable delay circuits has first and second inputs and first, second, third, and fourth transistors. A constant supply voltage is provided to sources of the first and the second transistors in each of the differential variable delay circuits. A variable supply voltage is provided to sources of the third and the fourth transistors in each of the differential variable delay circuits. Gates of the first and the third transistors are coupled to the first input. Gates of the second and the fourth transistors are coupled to the second input. The oscillator circuit generates a periodic output signal having a frequency that varies based on changes in the variable supply voltage.

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