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US 5,159,346 AGranted
Voltage controlled oscillator
AssigneeAlliant Techsystems Inc.
InventorsDonald N. Bosch, James B. Beyer, Robert L. Cravens, Stanley E. Swirhun
Life of this patent
Estimating the term…
Abstract
A voltage controlled oscillator (VCO 10) is disclosed in a "ring" configuration using two FETs. Two isolated voltage control terminals provide increased tuning bandwidth. The design uses an active feedback topology resulting in greater device size for higher output power and circuit Q.
Claims21
A voltage control oscillator comprising:
- (a) a first field effect transistor ("FET"), having a drain, a gate and a source;
- (b) a second FET, having a drain, a gate and a source, wherein said drain of said first FET is cooperatively connected to said gate of said second FET and said drain of said second FET is cooperatively connected to said gate of said first FET;
- and
- (c) voltage means, cooperatively connected to said gate of said first and second FETs respectively, for supplying a voltage to said first and second FET gates, wherein when said first and second FETs are biased an oscillation loop is created, whereby when a resonator is cooperatively connected to said drain of said second FET the frequency of the oscillator is controlled.
1 more element
A radar comprising:
- (a) a voltage controlled oscillator including:
- (i) a first field effect transistor ("FET"), having a drain, a gate and a source;
- (ii) a second FET, having a drain, a gate and a source, wherein said drain of said first FET is cooperatively connected to said gate of said second FET and said drain of said second FET is cooperatively connected to said gate of said first FET;
- and
- (iii) first and second voltage means, cooperatively connected to said gate of said first and second FETs respectively, for supplying a voltage to said first and second FET gates, wherein when said first and second FETs are biased an oscillation loop is created, whereby when a resonator is cooperatively connected to said drain of said second FET the frequency of the oscillator is controlled;
- and
- (b) a mixer cooperatively connected to said oscillator;
- and
- (c) an antenna cooperatively connected to said mixer.
6 more elements
A device for generating a signal comprising:
- (a) a first active voltage controlled variable resistor means having three ports for controlling the resistance between a first port and a second port by varying a voltage supplied to said first active resistor means;
- (b) a second active voltage controlled variable resistor means having three ports for controlling the resistance between a third port and a fourth port by varying a voltage supplied to said second active resistor means, wherien said first and second active resistor means are connected to one another such that active feedback occurs between said first and second active resistor means when biased thereby creating an oscillation signal;
- (c) resonator means, cooperatively connected to said first active resistor means, for controlling the frequency of the oscillation signal;
- and
- (d) filter means for filtering D.C. signals between said first and second active resistor means, and wherein varying a second voltage supplied to said first and second active resistor means changes the frequency of the oscillation signal.
2 more elements
A device for generating a signal comprising:
- (a) a first active voltage controlled variable resistor means having three ports for controlling the resistance between a first port and a second port by varying a voltage supplied to said first active resistor means;
- (b) a seccond active voltage controlled variable resistor means having three ports for controlling the resistance between a third port and a fourth port by varying a voltage supplied to said second active resistor means, wherein said first and second active resistor means are connected to one another such that active feedback occurs between said first and second active resistor means when biased thereby creating an oscillation signal;
- (c) resonator means, cooperatively connected to said first active resistor means, for controlling the frequency of the oscillation signal;
- and
- (d) an output cooperatively connected to said first active resistor means, said output connected via a small capacitance coupling capacitor, wherein phase noise is decreased, and wherein said output is connected to said first and second active resistor means such that said output is isolated from said resonator.
2 more elements
Dependencies are inferred from the claim text.