Highly-linear signal-modulated voltage controlled oscillator
First Claim
1. A voltage controlled oscillator system comprising:
- a frequency tuning circuit for receiving a frequency turning signal and a frequency tuning bias signal;
a modulation circuit coupled in a parallel fashion with the frequency tuning circuit;
at least one band tuning circuits coupled with the frequency tuning circuit in a parallel fashion having at least one switching circuit for receiving at least one band tuning signal and at least one switching signal; and
a core circuit coupled with the frequency tuning circuit, the modulation circuit, and the band tuning circuit for providing a first output and a second output that are complementary to each other,wherein the core circuit has at least one inductance module for providing a predetermined inductance,wherein upon asserting the switching signal, the switching circuit is enabled for configuring the band tuning circuit to join the frequency tuning circuit for determining a predetermined output frequency based on a total inductance and a total capacitance provided by the core circuit, the frequency tuning circuit, the modulation circuit and the band tuning circuit upon adjusting the frequency tuning signal, the frequency tuning bias signal, and the band tuning signal, andwherein all elements of the voltage controlled oscillator system are arranged in a substantially symmetrical fashion.
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Accused Products
Abstract
A VCO system embodying the features of the present invention includes a frequency tuning circuit, a modulation circuit coupled in a parallel fashion with the frequency tuning circuit, a band tuning circuit coupled with the frequency tuning circuit in a parallel fashion having at least one switching circuit, a core circuit coupled with the frequency tuning circuit, the modulation circuit, and the band tuning circuit, wherein upon asserting a switching signal and upon adjusting a frequency turning signal, a frequency tuning bias signal, and a band tuning signal, the switching circuit is enabled for configuring the band tuning circuit to join the frequency tuning circuit for adjusting a predetermined output frequency based on a total inductance and a total capacitance provided by the core circuit, the frequency tuning circuit, the modulation circuit and the band tuning circuit.
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Citations
24 Claims
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1. A voltage controlled oscillator system comprising:
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a frequency tuning circuit for receiving a frequency turning signal and a frequency tuning bias signal; a modulation circuit coupled in a parallel fashion with the frequency tuning circuit; at least one band tuning circuits coupled with the frequency tuning circuit in a parallel fashion having at least one switching circuit for receiving at least one band tuning signal and at least one switching signal; and a core circuit coupled with the frequency tuning circuit, the modulation circuit, and the band tuning circuit for providing a first output and a second output that are complementary to each other, wherein the core circuit has at least one inductance module for providing a predetermined inductance, wherein upon asserting the switching signal, the switching circuit is enabled for configuring the band tuning circuit to join the frequency tuning circuit for determining a predetermined output frequency based on a total inductance and a total capacitance provided by the core circuit, the frequency tuning circuit, the modulation circuit and the band tuning circuit upon adjusting the frequency tuning signal, the frequency tuning bias signal, and the band tuning signal, and wherein all elements of the voltage controlled oscillator system are arranged in a substantially symmetrical fashion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A voltage controlled oscillator system comprising:
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a frequency tuning circuit for receiving a frequency turning signal and a frequency tuning bias signal; a modulation circuit coupled in a parallel fashion with the frequency tuning circuit; at least one band tuning circuits coupled with the frequency tuning circuit in a parallel fashion having at least one switching circuit for receiving at least one band tuning signal and at least one switching signal; a phase-locked loop frequency synthesizer for providing the frequency tuning signal based on at least one of the outputs; a control circuit coupled with the modulation circuit for providing the modulation signal and the frequency tuning bias signal; and a core circuit coupled with the frequency tuning circuit, the modulation circuit, and the band tuning circuit for providing a first output and a second output that are complementary to each other, wherein the core circuit has at least one inductance module for providing a predetermined inductance, wherein upon asserting the switching signal, the switching circuit is enabled for configuring the band tuning circuit to join the frequency tuning circuit for determining a predetermined output frequency based on a total inductance and a total capacitance provided by the core circuit, the frequency tuning circuit, the modulation circuit and the band tuning circuit upon adjusting the frequency tuning signal, the frequency tuning bias signal, and the band tuning signal, and wherein all elements of the voltage controlled oscillator system are arranged in a substantially symmetrical fashion. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A voltage controlled oscillator system comprising:
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a frequency tuning circuit for receiving a frequency turning signal and a frequency tuning bias signal; a modulation circuit coupled in a parallel fashion with the frequency tuning circuit; at least one band tuning circuits coupled with the frequency tuning circuit in a parallel fashion having at least one switching circuit for receiving at least one band tuning signal and at least one switching signal, the band tuning circuit further including; a first and a second capacitance modules having a first and second predetermined capacitances coupled to the first and second outputs on their first ends, a first and second resistors coupled in series and further coupled serially between second ends of the first and second capacitance modules with a mid point between the two resistors controlled by the band tuning signal; and a first and a second switches coupled in series and further coupled serially between second ends of the first and second capacitance modules with a mid point between the two switches coupled to an electrical ground, wherein when the switching signal is applied to gates of the switches, the first and second capacitance modules are coupled in a serial fashion; a phase-locked loop frequency synthesizer for providing the frequency tuning signal based on at least one of the outputs; a control circuit coupled with the modulation circuit for providing the modulation signal and the frequency tuning bias signal; and a core circuit coupled with the frequency tuning circuit, the modulation circuit, and the band tuning circuit for providing a first output and a second output that are complementary to each other, wherein the core circuit has at least one inductance module for providing a predetermined inductance, wherein upon asserting the switching signal, the switching circuit is enabled for configuring the band tuning circuit to join the frequency tuning circuit for determining a predetermined output frequency based on a total inductance and a total capacitance provided by the core circuit, the frequency tuning circuit, the modulation circuit and the band tuning circuit upon adjusting the frequency tuning signal, the frequency tuning bias signal, and the band tuning signal, and wherein all elements of the voltage controlled oscillator system are arranged in a substantially symmetrical fashion. - View Dependent Claims (22, 23, 24)
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Specification