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US 2012/0235748 A1Published application
Amplifier, transmission apparatus, and gate voltage determination method
AssigneeFujitsu Limited
InventorsKeiji Masuda, Takumi Takayashiki
Life of this patent
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Abstract
An amplifier includes a detector configured to detect a given value used for monitoring a change in a gain of an amplifying element amplifying a signal in response to a gate voltage applied to a gate terminal, and a controller configured to judge, based on the detected given value, whether or not the gate voltage is to be increased, and to determine the increased gate voltage in response to the given value when the controller judges that the gate voltage is to be increased.
Claims21
An amplifier comprising:
- a detector configured to detect a given value used for monitoring a change in a gain of an amplifying element amplifying a signal in response to a gate voltage applied to a gate terminal;
- and
- a controller configured to judge, based on the detected given value, whether or not the gate voltage is to be increased, and to determine the increased gate voltage in response to the given value when the controller judges that the gate voltage is to be increased.
A transmission apparatus comprising:
- a transmitter configured to transmit an amplified transmission signal;
- a detector configured to detect a given value used for monitoring a change in a gain of an amplifying element amplifying the transmission signal in response to a gate voltage applied to a gate terminal;
- a controller configured to judge, based on the detected given value, whether or not the gate voltage is to be increased, and to determine the increased gate voltage in response to the given value the controller judges that the gate voltage is to be increased.
A gate voltage determination method, comprising:
- detecting a given value serving as a factor that changes a gain of an amplifying element amplifying a signal in response to a gate voltage applied to a gate terminal;
- judging, based on the detected given value, whether or not the gate voltage is to be increased;
- and
- determining the increased gate voltage in response to the given value when it is judged that the gate voltage is to be increased.
1 more element
An amplifier comprising:
- an amplifying element configured to amplify a signal in response to a gate voltage applied to a gate terminal;
- a detection circuit configured to detect a value of a parameter used for monitoring a change in a gain of the amplifying element;
- and
- a control circuit configured to determine the gate voltage based on the detected value of the parameter.
1 more element
Dependencies are inferred from the claim text.