Low-noise amplifier with through-mode
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United States of America Patent
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Feb 11, 2014
Grant Date -
Jun 6, 2013
app pub date -
Feb 4, 2013
filing date -
Jun 1, 2011
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Abstract
The low-noise amplifier with through mode is configured such that a source grounded transistor and a gate grounded transistor are connected in cascode, and a load impedance element and a switching transistor are serially connected between the drain of the gate grounded transistor and a power supply, and a through pass circuit is connected between an input terminal and an output terminal. The gate voltage of the gate grounded transistor is regulated by a bias circuit and the voltage of a mode control terminal is converted by a level shifter to control the gate voltage of the switching transistor, whereby, in the case of using only transistors whose terminal-to-terminal breakdown voltages are each equal to or less than the power supply voltage, it becomes feasible to prevent voltages equal to or more than the terminal-to-terminal breakdown voltages from being applied between the terminals of each transistor.
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