Patent
Low phase noise two port voltage controlled oscillator
TLDR
In this paper, a coarse tuning circuit is serially connected between the resonant circuit and the input to the amplifier to minimize noise at the frequency of operation while optimizing the coarse tuning range.Abstract:
A low noise two port voltage controlled oscillator having a coarse tuning circuit serially connected to an inductor to form a resonant circuit. A fine tuning circuit is serially connected between the resonant circuit and the input to the amplifier. A large capacitance series silicon varactor minimizes noise at the frequency of operation while optimizing the coarse tuning range.read more
Citations
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Patent
Remotely interrogated transponder
TL;DR: In this paper, a radio frequency transponder is provided that combines high signal sensitivity in the receive mode and variable frequency capability in the transmit mode in a low component and power efficient design.
Patent
Phase-locked loop using continuously auto-tuned inductor-capacitor voltage controlled oscillator
TL;DR: Improved voltage controlled oscillator circuits and phase-locked loop circuits are discussed in this article, where a coarse-tuning input coupled to a linear amplifier and a fine-tuned output coupled to the second linear amplifier are employed in a phaselocked loop circuit, where a frequency of a signal on the output is changeable as a function of the input voltage.
Patent
Voltage controlled oscillator having a phase noise reduction device
Erik Bengtsson,Scott R. Justice +1 more
TL;DR: In this article, a differential voltage controlled oscillator core, a first linear capacitor, a second linear capacitance and a second phase noise reduction device are provided, where the second linear capacitor is electrically cross-coupled from the first differential input to the second output.
Patent
Voltage controlled oscillator for oscillating signals with high C/N ratio
TL;DR: In this article, a voltage controlled oscillator includes an oscillating transistor having a collector coupled to ground at high frequencies, and the length of the microstrip is about ½ to about ¾ of the wavelength of an oscillation frequency.
Patent
Voltage controlled microwave oscillator using a varactor as inductance
TL;DR: In this paper, a tuning circuit for a VCO includes a coarse tuning section and a fine tuning section, where a capacitance connected in parallel with the varactor inductances forms a resonant circuit therewith and serves to widen the tuning band of the VCO in adjustable manner.
References
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Patent
Low noise microstrip voltage controlled oscillator
TL;DR: In this paper, a microwave oscillator using a stripline circuit is described, where a microstrip circuit is coupled to the emitter of the transistor while the collector is coupled with ground.
Patent
Voltage controlled crystal oscillator having wide frequency range
Jacques Helle,Gerard Charlet +1 more
TL;DR: To extend the variation range of a controlled frequency oscillator comprising a piezoelectric element, a lithium tantalate or lithium niobate element is used in parallel with which there is connected a linearization circuit comprising an inductance in series with a parallel circuit comprising a resistor and a capacitor.
Patent
Wideband, millimeter wave frequency Gunn oscillator
TL;DR: In this article, a tunable millimeter wave frequency Gunn oscillator operates efficiently beyond the normal Gunn oscillators frequency range through the use of a second harmonic enhancement circuit, which is tuned to the fundamental frequency of the oscillator and is tracked with the second harmonic circuit to provide a wide tuning range.
Patent
Monolithic microwave wide-band VCO
Gailon E. Brehm,Bentley N. Scott +1 more
TL;DR: In this paper, a monolithic microwave voltage-controlled oscillator including one or more FETs integrated with a wide-ratio varactor is presented, where the FET is formed in the same epitaxial layer with the varactor, and complicated doping profiles are not required.
Patent
Voltage controlled oscillator
TL;DR: In this article, a voltage controlled oscillator is provided with one or more varactors connected in series with the frequency determining capacitors of the oscillator, which increase the tunable range and improve the frequency variation.