Circuit and method for input side impedance matching of a power amplifier in an electronic device
AssigneeKoninklijke Philips Electronics N.V.
InventorVickram R. Vathulya
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Abstract
A circuit and method for input side impedance matching of a power amplifier in an electronic device. Specifically, the present invention provides an impedance transformer network that includes a negative resistor in series with a bondwire inductor. The network is placed in parallel with a signal source and synthesizes the source side impedance at the input of the power amplifier. The desired impedance is synthesized by selecting an appropriate value for the negative resistor and setting the reactance of the inductor equal to the capacitance of the electronic device at a required frequency of operation.
Claims20
A circuit for input side impedance matching of a power amplifier in an electronic device, comprising:
- a source for providing a signal, wherein the signal has a predetermined impedance;
- and
- an impedance transformer network joined in parallel with the source, wherein the network comprises a negative resistor in series with an inductor, and wherein the network synthesizes the predetermined impedance at an input of the power amplifier.
A circuit for input side impedance matching of a power amplifier in an electronic device, comprising:
- a source for providing a signal, wherein the signal has a predetermined impedance;
- an impedance transformer network joined in parallel with the source, wherein the network comprises a negative resistor in series with an inductor;
- and
- wherein a value of the negative resistor is selected to synthesize the predetermined impedance at an input of the power amplifier, and wherein the inductor has a reactance equal to a capacitance of the device at a required frequency of operation.
A method for matching impedance at an input of a power amplifier in an electronic device, comprising the steps of:
- providing a signal from a source, wherein the provided signal has a predetermined impedance;
- joining an impedance transformer network in parallel with the source, wherein the network comprises a negative resistor in series with an inductor;
- and
- selecting a value for the negative resistor so that the predetermined impedance is synthesized at the input of the power amplifier.
Dependencies are inferred from the claim text.