Device and method for controlling a receiving amplifier in a radio terminal
AssigneeSamsung Electronics Co., Ltd.
InventorsJae-Sun Park, Hong-Kyu Kim
Life of this patent
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Abstract
A device for controlling a receiving amplifier in a radio terminal by monitoring the transmission/reception mode and varying the current to an amplifier that amplifies an output signal to vary the linearity of the amplifier according to a received signal strength indicator (RSSI) measured of the input signal and a measured input signal quality.
Claims8
A device for controlling a receiving amplifier in a radio terminal, comprising:
- at least one amplifier for amplifying an input signal, the linearity of the amplifier being dependent on an amount of current supplied thereto;
- a received signal strength indicator (RSSI) measurer for measuring RSSI of the input signal;
- a variable power supply for controlling an amount of the current supplied to the amplifier in response to a control signal;
- a signal quality analyzer for measuring a quality of the input signal;
- and
- a power controller for generating said control signal during a transmission mode according to the measured RSSI and the measured signal quality, wherein said control signal indicates whether the measured RSSI and the measured signal quality are lower than a threshold during the transmission mode.
A method for controlling a receiving amplifier in a radio terminal including at least one amplifier for amplifying an input signal, the linearity of the amplifier being dependent on an amount of current supplied thereto, a variable power supply for controlling an amount of the current supplied to the amplifier in response to a control signal, a signal quality analyzer for measuring a quality of the input signal, and an RSSI measurer for measuring RSSI of the input signal, the method comprising the steps of:
- (a) examining whether the radio terminal is in a transmission mode of operation;
- (b) measuring RSSI of the input signal when the radio terminal is in the transmission mode and measuring a quality of the input signal when the measured RSSI is higher than or equal to a threshold;
- and
- (c) varying current being supplied to the amplifier according to the measured RSSI and signal quality, supplying a low current to the amplifier and returning to step (a) when the measured signal quality is higher than or equal to the threshold and supplying a high current to the amplifier and returning to step (a) when the measured RSSI and signal quality are lower than the threshold.
Dependencies are inferred from the claim text.