Oscillators – Automatic frequency stabilization using a phase or frequency... – Particular frequency control means
Reexamination Certificate
2007-08-14
2007-08-14
Kinkead, Arnold (Department: 2817)
Oscillators
Automatic frequency stabilization using a phase or frequency...
Particular frequency control means
C331S057000, C331S17700V, C327S158000, C327S159000
Reexamination Certificate
active
11251467
ABSTRACT:
A VCO has a plurality of MIGFETs coupled to provide phase adjustment in response to receiving digital phase adjustment control signals. The VCO includes a ring oscillator implemented as a plurality of serially coupled inverters. A phase adjustment circuit is coupled to the output of each inverter. The phase adjustment circuit of each stage comprises a predetermined number of MIGFETs. In one embodiment, half of the MIGFETs are used to speed-up the phase/frequency of the OUTPUT signal a predetermined amount in response to receiving speed-up control signals. The other half of the MIGFETs are used to slow-down the phase/frequency of the OUTPUT signal a predetermined amount in response to the receiving slow-down control signals. The VCO requires relatively less surface area, is simple, and is easy to implement.
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Sanchez Hector
Shi Zhonghai
Hill Daniel D.
King Robert L.
Kinkead Arnold
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