Oscillators – Automatic frequency stabilization using a phase or frequency... – Particular frequency control means
Patent
1994-06-23
1996-09-24
Pascal, Robert
Oscillators
Automatic frequency stabilization using a phase or frequency...
Particular frequency control means
331 8, 331 17, H03L 700
Patent
active
055594735
ABSTRACT:
A circuit design extending the range and linearizing the transfer characteristic of a fast voltage controlled oscillator (VCO). In addition, a multi-range VCO is described. Range extension is achieved by modifying the delay cell of a current controlled ring oscillator. The VCO transfer characteristic is linearized by piece-wise linear current control added to the delay cell. Additionally, a VCO capable of multi-range operation is provided. With the addition of multiple current sources which control booster inverter current, and by selectively enabling the additional current sources, a VCO with multiple frequency ranges can be achieved.
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Anderson Michael B.
Schmitt Kenneth C.
AT&T Global Information Solutions Company
Bailey Wayne P.
Hyundai Electronics America
Pascal Robert
Symbios Logic Inc.
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