RESONANT OSCILLATOR CIRCUIT WITH REDUCED STARTUP TRANSIENTS
First Claim
1. A resonant oscillator circuit, comprising:
- a first inductor;
a second inductor;
a first capacitance;
a second capacitance;
wherein the first and second inductors are configured to operate with the first and second capacitances to produce resonant oscillations which appear at a first phase output and a second phase output; and
a startup circuit configured to start the resonant oscillator circuit in a state where the first phase output is at a peak voltage, the second phase output is at a base voltage, and currents through the first and second inductors are substantially zero, so that oscillations commence without a significant startup transient.
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Accused Products
Abstract
Some embodiments of the present invention provide a system that implements a resonant oscillator circuit. This resonant oscillator circuit includes: a first inductor, a second inductor, a first capacitance, and a second capacitance, wherein the first and second inductors are configured to operate with the first and second capacitances to produce resonant oscillations which appear at a first phase output and a second phase output. The system also includes a startup circuit which is configured to start the resonant oscillator circuit in a state where: the first phase output is at a peak voltage; the second phase output is at a base voltage; and currents through the first and second inductors are substantially zero. By starting the resonant oscillator circuit in this state, the oscillations commence without a significant startup transient.
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Citations
23 Claims
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1. A resonant oscillator circuit, comprising:
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a first inductor; a second inductor; a first capacitance; a second capacitance; wherein the first and second inductors are configured to operate with the first and second capacitances to produce resonant oscillations which appear at a first phase output and a second phase output; and a startup circuit configured to start the resonant oscillator circuit in a state where the first phase output is at a peak voltage, the second phase output is at a base voltage, and currents through the first and second inductors are substantially zero, so that oscillations commence without a significant startup transient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for starting up a resonant oscillator circuit, wherein the resonant oscillator circuit includes a first inductor, a second inductor, a first capacitance, and a second capacitance, wherein the first and second inductors are configured to operate with the first and second capacitances to produce resonant oscillations which appear at a first phase output and a second phase output, the method comprising:
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performing one or more initialization operations so that the resonant oscillator circuit is in an initial state where the first phase output is at a peak voltage, the second phase output is at a base voltage, and currents through the first and second inductors are substantially zero; and allowing the resonant oscillator circuit to commence oscillations from the initial state without a significant startup transient. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A resonant oscillator circuit, comprising:
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a first inductor with a constant potential terminal coupled to an input voltage and a time-varying potential terminal coupled to a first phase output; a second inductor with a constant potential terminal coupled to the input voltage and a time-varying potential terminal coupled to a second phase output; a first n-type transistor with a source terminal coupled to a base voltage, a drain terminal coupled to the first phase output, and a gate terminal coupled to the second phase output; a second n-type transistor with a source terminal coupled to the base voltage, a drain terminal coupled to the second phase output, and a gate terminal coupled to the first phase output; a first capacitance, which includes capacitive components from a load on the first phase output and the gate terminal of the second n-type transistor; a second capacitance, which includes capacitive components from a load on the second phase output and the gate terminal of the first n-type transistor; and a startup circuit configured to start the resonant oscillator circuit in a state where the first phase output is at a peak voltage, the second phase output is at a base voltage, and currents through the first and second inductors are substantially zero, so that oscillations commence without a significant startup transient. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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Specification