Apparatus and method for tuning an inter-stage matching network of an integrated multistage amplifier
AssigneeKoninklijke Philips Electronics N.V.
InventorSifen Luo
Life of this patent
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Abstract
A tuning circuit for compensating an inter-stage matching network included in an integrated multistage radio frequency (RF) amplifier includes one or more capacitors connected in shunt between ground and a voltage supply to the amplifier. The capacitors have values selected to effectively compensate the inductance from a pull-up inductor included in the inter-stage matching network to provide improved inter-stage matching when inductance and capacitance values of the inter-stage matching network deviate from their desired values due to parasitics and/or when other components, such as input-stage and output-stage transistors of the amplifiers deviate from their pre-fabrication simulation models.
Claims17
A tuning circuit for an integrated multistage radio frequency (RF) amplifier having an inter-stage matching network and a voltage supply input, comprising:
- a printed circuit board (PCB) trace for coupling a DC voltage source to the voltage supply input;
- and
- a first discrete capacitor and a second discrete capacitor, both connected in shunt between the PCB trace and ground, for tuning inductance on the voltage supply input to improve performance of the inter-stage matching network within the integrated multistage RF amplifier.
An electronic circuit, comprising:
- a first stage amplifier having a voltage supply input;
- a second stage amplifier operatively coupled to the first stage amplifier;
- an inter-stage matching network connected to the first and second stage amplifiers;
- and
- a capacitor connected between the voltage supply input and ground, the capacitor having a capacitance value selected for compensating inductance on the voltage supply input to improve performance of the inter-stage matching network.
A method of tuning an inter-stage matching network included in a multistage amplifier having a voltage supply input, comprising:
- providing an integrated circuit chip containing the multistage amplifier;
- connecting the voltage supply input to a printed circuit board (PCB) trace for providing a DC supply voltage;
- and
- connecting a discrete capacitor in shunt between the PCB trace and ground, wherein the discrete capacitor has a capacitance value selected to tune the inter-stage matching network of the multistage RF amplifier.
Dependencies are inferred from the claim text.