Phase shift circuit
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United States of America Patent
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May 15, 2018
Issued Date -
N/A
app pub date -
Dec 5, 2016
filing date -
Jun 6, 2014
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Abstract
A phase shift circuit includes a 90° hybrid circuit, variable capacitors, a switch circuit, and a balun circuit. The 90° hybrid circuit includes a high-frequency signal input terminal and a high-frequency signal output terminal. The variable capacitors are respectively connected to between first and second variable capacitor connection terminals of the 90° hybrid circuit and the ground. The balun circuit includes an unbalanced signal input terminal and balanced signal output terminals formed by a pair of terminals. The switch circuit selects any one of the balanced signal output terminal and the balanced signal output terminal of the balun circuit and connects the selected terminal to the high-frequency signal input terminal to the 90° hybrid circuit.
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