Multi-band amplifier having multi-tap RF choke
First Claim
1. An amplifier circuit formed on a single semiconductor substrate, comprising:
- a first amplifier having at least one stage for amplifying signals within a first frequency band;
a second amplifier having at least one stage for amplifying signals within a second frequency band; and
a tapped coil having a first tap thereof coupled to a stage of the first amplifier and a second tap thereof coupled to a stage of the second amplifier;
wherein the amplifier circuit is an RF amplifier circuit, a first portion of the tapped coil serving as an RF choke for said stage of the first amlifier, and a second portion of the tapped coil serving as an RF choke for said stage of the second amplifier.
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Accused Products
Abstract
An amplifier circuit formed on a single semiconductor substrate includes a first amplifier having at least one stage for amplifying signals within a first frequency band; a first amplifier having at least one stage for amplifying signals within a second frequency band; and a tapped coil having one end thereof coupled to a stage of the first amplifier and a tap thereof coupled to a stage of the second amplifier. The amplifier circuit may be an RF amplifier circuit, a first portion of the tapped coil serving as an RF choke for said stage of the first amplifier, and a second portion of the tapped coil serving as an RF choke for said stage of the second amplifier. Sharing the tapped coil between multiple band amplifiers increases integration density.
30 Citations
6 Claims
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1. An amplifier circuit formed on a single semiconductor substrate, comprising:
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a first amplifier having at least one stage for amplifying signals within a first frequency band;
a second amplifier having at least one stage for amplifying signals within a second frequency band; and
a tapped coil having a first tap thereof coupled to a stage of the first amplifier and a second tap thereof coupled to a stage of the second amplifier;
wherein the amplifier circuit is an RF amplifier circuit, a first portion of the tapped coil serving as an RF choke for said stage of the first amlifier, and a second portion of the tapped coil serving as an RF choke for said stage of the second amplifier. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification