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US 8,712,346 B2Granted
Transmission device
AssigneeFujitsu Limited
InventorMitsuhiko Manpo
Life of this patent
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Abstract
A transmission device, includes an amplifying unit which amplifies and outputs a modulation signal, a detecting unit which detects an output power of the amplifying unit, an output power changing unit which changes the output power of the amplifying unit based on an output of the detecting unit, and a control unit which controls an input impedance of the detecting unit based on each communication method.
Claims8
A transmission device, comprising:
- an amplifier configured to amplify and output a modulation signal;
- a detecting circuitry coupled to the amplifier, configured to detect an output power of the amplifier;
- and
- a processing circuitry coupled to the detecting circuitry, configured to:
- change the output power of the amplifier based on an output of the detecting circuitry;
- and
- control an input impedance of the detecting circuitry based on each communication method,
- wherein, the processing circuitry is configured to:
- compare the output voltage of the detecting circuitry to a target value which is set in advance, and
- set the output power in such a way that the output from the amplifier gets larger until the output voltage value of the detecting circuitry becomes the target value.
7 more elements
A method of adjusting an amplitude of a transmission device, the method comprising:
- amplifying and outputting a demodulation signal using an amplifier;
- detecting an output power of the amplifier using detecting circuitry coupled to the amplifier;
- and
- changing amplifier based on output of the detecting circuitry using a processing circuitry coupled to the detecting circuitry;
- comparing the output voltage of the detecting circuitry to a target value which is set in advance, and
- setting the output power in such a way that the output from the amplifier gets larger until the output voltage value of the detecting circuitry becomes the target value;
- and
- controlling an input impedance of the detecting circuitry based on each communication method using the processing circuitry.
5 more elements
Dependencies are inferred from the claim text.