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US 5,475,345 AGranted
Ultra-fast MOS device circuits
AssigneeAT&T Corp.
InventorThaddeus J. Gabara
Life of this patent
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Abstract
A CMOS coupled-tank oscillator for VLSI circuit applications is disclosed. The coupled-tank oscillator has two inverters coupled, input-to-output, by inductances that may be simply wires, and a capacitance acting in parallel with each inverter that may be, simply, the invert's gate capacitance. The invention permits 0.9-micron CMOS oscillators to produce high-frequency signals.
Claims8
A coupled-tank oscillator circuit comprising:
- two MOS inverters having respective inputs and outputs;
- an inductor connecting the input of each inverter to the output of the other inverter;
- and
- a respective capacitance acting in parallel to each of said inverters, whereby higher frequency oscillator operation is obtained.
1 more element
A coupled-tank oscillator circuit comprising:
- two MOS inverters having respective inputs and outputs;
- a wire connecting the input of each inverter to the output of the other inverter;
- and
- a respective capacitance acting in parallel to each of said inverters, whereby a high-frequency oscillator is provided that is simple to manufacture and provides improved power-efficiency.
1 more element
A coupled-tank oscillator circuit comprising:
- a MCM device including two MOS inverters having respective inputs and outputs and inductors connecting the input of each inverter to the output of the other inverter;
- and
- a respective capacitance acting in parallel to each of said inverters, whereby improved high-frequency performance is provided.
Dependencies are inferred from the claim text.