05559476 is referenced by 46 patents and cites 5 patents.

A VCO includes a ring oscillator formed by connecting a plurality of voltage controlled inverting delay cells together, and a plurality of transistors for providing control voltages to the plurality of voltage controlled inverting delay cells. Preferably, each transistor has a drain connected to a reference voltage, and a source connected to a voltage controlled inverting delay cell paired to that transistor. Consequently, each transistor acts as a source-follower so that it provides a control voltage to its corresponding voltage controlled inverting delay cell which follows a control voltage driving its gate, thereby isolating the control voltage provided to its corresponding voltage controlled inverting delay cell from power supply noise.

Title
Voltage controlled oscillator including voltage controlled delay circuit with power supply noise isolation
Application Number
8/455311
Publication Number
5559476
Application Date
May 31, 1995
Publication Date
September 24, 1996
Inventor
He Du
Campbell
CA, US
Zhongxuan Zhang
Fremont
CA, US
Agent
Majestic Parsons Siebert & Hsue
Assignee
Cirrus Logic
CA, US
IPC
H03B 5/02
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