Harmonic cancellation circuit for an RF switch branch
First Claim
1. A harmonic cancellation circuit for a radio frequency (RF) switch branch comprising:
- a first transistor having a first gate terminal and a first body terminal;
a second transistor having a second gate terminal coupled to the first body terminal and having a second body terminal coupled to the first gate terminal;
a first resistor coupled between a first coupling node and the second body terminal; and
a second resistor coupled between a second coupling node and the first body terminal, wherein the first transistor and the second transistor are configured to generate an inverse phase third harmonic signal relative to a third harmonic signal generated by the RF switch branch, such that the inverse phase third harmonic signal is output through the first resistor and the second resistor to the RF switch branch to reduce the third harmonic signal.
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Accused Products
Abstract
Disclosed is a harmonic cancellation circuit for an RF switch branch having a first transistor with a first gate terminal and a first body terminal, a second transistor having a second gate terminal coupled to the first body terminal, and having a second body terminal coupled to the first gate terminal. Also included is a first resistor coupled between a first coupling node and the second body terminal, and a second resistor coupled between a second coupling node and the first body terminal, wherein the first transistor and second transistor are adapted to generate an inverse phase third harmonic signal relative to a third harmonic signal generated by the RF switch branch, such that the inverse phase third harmonic signal is output through the first resistor and the second resistor to the RF switch branch to reduce the third harmonic signal.
18 Citations
24 Claims
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1. A harmonic cancellation circuit for a radio frequency (RF) switch branch comprising:
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a first transistor having a first gate terminal and a first body terminal; a second transistor having a second gate terminal coupled to the first body terminal and having a second body terminal coupled to the first gate terminal; a first resistor coupled between a first coupling node and the second body terminal; and a second resistor coupled between a second coupling node and the first body terminal, wherein the first transistor and the second transistor are configured to generate an inverse phase third harmonic signal relative to a third harmonic signal generated by the RF switch branch, such that the inverse phase third harmonic signal is output through the first resistor and the second resistor to the RF switch branch to reduce the third harmonic signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An RF switch branch comprising:
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a plurality of series coupled transistor switches having a first port and a second port; and a plurality of series coupled harmonic cancellation circuits communicatively coupled in parallel with at least some of the plurality of series coupled transistor switches, each of the plurality of series coupled harmonic cancellation circuits comprising; a first transistor having a first gate terminal and a first body terminal; a second transistor having a second gate terminal coupled to the first body terminal and having a second body terminal coupled to the first gate terminal; a first resistor coupled between a first coupling node and the second body terminal; and a second resistor coupled between a second coupling node and the first body terminal, wherein the first transistor and the second transistor are configured to generate an inverse phase third harmonic signal relative to a third harmonic signal generated by the RF switch branch, such that the inverse phase third harmonic signal is output through the first resistor and the second resistor to the RF switch branch to reduce the third harmonic signal. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification