Circuit configuration for controlling the transmitting power of a battery-operated transceiver
First Claim
1. A circuit configuration for controlling the transmitting power of a battery-operated transceiver, the circuit configuration comprising:
- a battery for providing a supply voltage;
a power stage for controllable amplification of a radio-frequency signal, said power stage having a gain;
a comparison device, said comparison device having an input side for receiving a reference signal and a signal coupled to the supply voltage, and said comparison device having an output side for supplying a difference signal; and
a control device for controlling the gain of said power stage in dependence on the difference signal.
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Accused Products
Abstract
A circuit configuration is provided for controlling the transmitting power of a battery-operated transceiver. A high transmitting power of a mobile transceiver generates a high voltage drop across an internal impedance of the battery which can lead to the device switching off. A reduction in the transmitting power in dependence on the battery voltage is therefore proposed. The battery voltage is thus compared with a reference voltage and a signal representing a nominal transmitting power is correspondingly corrected. The circuit can be integrated in a simple manner with analog components in an IC.
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Citations
8 Claims
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1. A circuit configuration for controlling the transmitting power of a battery-operated transceiver, the circuit configuration comprising:
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a battery for providing a supply voltage;
a power stage for controllable amplification of a radio-frequency signal, said power stage having a gain;
a comparison device, said comparison device having an input side for receiving a reference signal and a signal coupled to the supply voltage, and said comparison device having an output side for supplying a difference signal; and
a control device for controlling the gain of said power stage in dependence on the difference signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A circuit configuration for controlling the transmitting power of a battery-operated transceiver in a mobile telephone for operation in a cellular telephone network, the circuit configuration comprising:
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a battery for providing a supply voltage;
a power stage for controllable amplification of a radio-frequency signal, said power stage having a gain;
a comparison device, said comparison device having an input side for receiving a reference signal and a signal coupled to the supply voltage, and said comparison device having an output side for supplying a difference signal; and
a control device for controlling the gain of said power stage in dependence on the difference signal.
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Specification