Wireless communication circuit and wireless communication apparatus using the same
AssigneeSharp Kabushiki Kaisha
InventorsToshiyuki Tanaka, Shinji Hara, Kazuya Oyama, Manabu Omori
Life of this patent
Estimating the term…
Abstract
When power to be transmitted varies, a control section instructs an AGC control section to control a gain of an IQ modulation processing section 6 in accordance with the power. A switch selects a power source voltage, corresponding to the power to be transmitted, from power source voltages V1 to V3 of a wireless module, in accordance with an instruction of the control section, so as to supply thus selected power source voltage to a power amplifier. Thus, it is possible to realize a wireless communication circuit which occupies a less area and consumes smaller amounts of power without narrowing a communication range.
Claims12
A wireless communication circuit, provided with an amplifier for amplifying an inputted signal so as to output thus amplified signal to an antenna, said wireless communication circuit comprising:
- a switch configured to be supplied predetermined plural constant voltages and to select one of the predetermined plural constant voltages as a constant voltage supplied to the amplifier, the predetermined plural constant voltages also being supplied to at least one of a plurality of circuits, other than the amplifier, either contained in the wireless communication circuit or electrically connected to the wireless communication circuit;
- control means for controlling the switch to select said one of the predetermined plural voltages as the constant voltage supplied to the amplifier in accordance with a power which should be outputted by the amplifier;
- and
- a detector to detect an output of the amplifier;
- and
- a controller to adjust transmission power of the antenna to be constant in response to the detected output of the amplifier, wherein
- the constant voltages of the predetermined plural constant voltages are different from one another.
A wireless communication apparatus, comprising a wireless communication circuit, provided with an amplifier for amplifying an inputted signal so as to output thus amplified signal to an antenna, said wireless communication circuit including:
- a switch configured to be supplied predetermined plural constant voltages and to select one of the predetermined plural constant voltages as a constant voltage supplied to the amplifier, the predetermined plural constant voltages also being supplied to at least one of a plurality of circuits, other than the amplifier, either contained in the wireless communication circuit or electrically connected to the wireless communication circuit;
- control means for controlling the switch to select said one of the predetermined plural voltages as the constant voltage supplied to the amplifier in accordance with a power which should be outputted by the amplifier;
- a detector to detect an output of the amplifier;
- and
- a controller to adjust transmission power of the antenna to be constant in response to the detected output of the amplifier, wherein
- said wireless communication apparatus is mobile, and
- the constant voltages of the predetermined plural constant voltages are different from one another.
Dependencies are inferred from the claim text.