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US 6,586,992 B1Granted
System and method for increasing power range in a power amplifier using a single voltage supply
AssigneeGlobespanVirata, Inc.
InventorLeonid Strakovsky
Life of this patent
Estimating the term…
Abstract
A system and method for providing additional voltage to an amplifier circuit, wherein the voltage is supplied using a single voltage supply and the amplifier voltage rail is configured to track the amplitude of the input signal.
Claims22
A system for variably adjusting the voltage supply of a power amplifier circuit comprising:
- a power amplifier;
- a primary voltage supply configured to supply constant voltage to the power amplifier;
- a control circuit configured to compare an input signal to a predetermined threshold, the control circuit further configured to generate a charge mode signal and an active mode signal, the charge mode signal generated in response to the input signal not exceeding the predetermined threshold, the active mode signal generated in response to the input signal exceeding the predetermined threshold;
- a capacitor circuit configured to receive the charge mode signal and the active mode signal, the capacitor circuit further configured to charge to approximately the predetermined voltage of the voltage supply in response to the charge mode signal, the capacitor circuit further configured to supply voltage in conjunction with the voltage supply to the power amplifier in response to the active mode signal.
1 more element
A system for providing additional voltage to a power amplifier circuit having a single voltage source, the system comprising:
- a passive voltage supply circuit configured to selectively provide voltage to a power amplifier circuit in response to a control signal;
- and
- a control circuit connected to the passive voltage supply, the control circuit further comprising:
- a receiver configured to receive an input signal;
- a comparator circuit configured to compare the received input signal with a predetermined threshold, the comparator circuit further configured to produce the control signal, the control signal being a charge mode signal when the input signal does not exceed the predetermined threshold, the control signal further being an active mode signal when the input signal exceeds the predetermined threshold;
- and
- a plurality of switches configured to receive the control signal, the plurality of switches configured to set the passive voltage supply circuit to charge mode in response to the charge mode signal, the plurality of switches further configured to set the passive voltage supply circuit to active mode in response to the active mode signal.
4 more elements
A method for providing additional voltage to a power amplifier circuit having a single voltage source, the method comprising the steps of:
- comparing an input signal to a predetermined threshold;
- producing a control signal in response to the comparing step, the control signal being a charge mode signal when the input signal does not exceed the predetermined threshold, the control signal being an active mode signal when the input signal exceeds the predetermined threshold;
- charging a passive voltage supply circuit in response to the control signal being a charge mode signal;
- and
- activating the passive voltage supply circuit to provide voltage to a power amplifier in response to the control signal being an active mode signal.
2 more elements
A system for providing additional voltage to a power amplifier circuit having a single voltage source, the system comprising:
- voltage supply means for selectively providing voltage to a power amplifier, the voltage supply means comprising passive energy storage means for storing energy;
- and
- controlling means for controlling the voltage supply means, the controlling means further comprising:
- comparing means for comparing an input signal with a predetermined threshold, the comparing means further for generating a control signal, the control signal being a charge mode signal when the input signal does not exceed the predetermined threshold, the control signal being an active mode signal when the input signal exceeds the predetermined threshold;
- and
- switching means for receiving the control signal, the switching means further for charging the voltage supply means in response to the charge mode signal, the switching means further for supplying power to a power amplifier in response to the active mode signal.
3 more elements
Dependencies are inferred from the claim text.