Power control apparatus with PAM reference voltage tuner for a mobile terminal
First Claim
1. A transmission power control apparatus for a mobile terminal comprising:
- a mobile station control unit for controlling a power control of the mobile terminal;
an intermediate frequency (IF) gain controller for adjusting IF gain of a transmission IF signal generated from a IF processor based on an IF gain control signal from the mobile station control unit;
a power amplifier module (PAM) for amplifying the adjusted transmission IF signal; and
a reference voltage control unit for adjusting reference voltage based on a transmission gain control signal from the mobile station control unit,wherein the reference voltage control unit comprises;
a reference voltage tuner for tuning a voltage from a transmission power source and providing a reference voltage to the PAM; and
an actuator for actuating the reference voltage tuner based on the reference voltage tuner output and the transmission gain control signal from the mobile station control unit, andwherein the reference voltage tuner further comprises;
a transistor of which a base terminal is connected to an output terminal of the actuator; and
a first resistor traversing emitter and collector terminals of the transistor.
1 Assignment
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Accused Products
Abstract
A transmission power control apparatus of a mobile terminal includes an intermediate frequency automatic gain controller for receiving a transmission intermediate frequency signal and performing an intermediate frequency automatic gain adjustment. A power amplifier for amplifying the transmission intermediate frequency signal. A mobile station modem (MSM) for outputting a transmission gain control signal to the intermediate frequency automatic gain controller, and a reference voltage control unit for receiving the transmission gain control signal and outputting a reference voltage to the power amplifier are also provided. Since the change of the reference voltage is always under control in the power mode switching, the burst noise occurrence due to the sudden reference voltage change in the transmission power can be restrained, and increased battery use time can be achieved by using a low reference voltage in the low power mode.
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Citations
46 Claims
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1. A transmission power control apparatus for a mobile terminal comprising:
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a mobile station control unit for controlling a power control of the mobile terminal; an intermediate frequency (IF) gain controller for adjusting IF gain of a transmission IF signal generated from a IF processor based on an IF gain control signal from the mobile station control unit; a power amplifier module (PAM) for amplifying the adjusted transmission IF signal; and a reference voltage control unit for adjusting reference voltage based on a transmission gain control signal from the mobile station control unit, wherein the reference voltage control unit comprises; a reference voltage tuner for tuning a voltage from a transmission power source and providing a reference voltage to the PAM; and an actuator for actuating the reference voltage tuner based on the reference voltage tuner output and the transmission gain control signal from the mobile station control unit, and wherein the reference voltage tuner further comprises; a transistor of which a base terminal is connected to an output terminal of the actuator; and a first resistor traversing emitter and collector terminals of the transistor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A method of controlling transmission power for a mobile terminal comprising:
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controlling a power control of the mobile terminal by a mobile station module (MSM); adjusting an intermediate frequency (IF) gain of a transmission IF signal generated from an IF processor based on an IF gain control signal from the mobile station control unit; amplifying the adjusted transmission IF signal by a power amplifier module (PAM); and determining a reference voltage based on a transmission gain control signal from the MSM, wherein the reference voltage determining further comprises; tuning a reference voltage from a transmission power source and providing a reference voltage to the PAM by a reference voltage tuner; and actuating the reference voltage tuner based on the reference voltage tuner output and the transmission gain control signal from the mobile station control unit by an actuator, and wherein the reference voltage tuning comprises; connecting a transistor base terminal to an output terminal of the actuator; and traversing emitter and collector terminals of the transistor by a first resistor. - View Dependent Claims (25, 27, 28)
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26. The method as claimed in 25, further comprising determining a power mode of the reference voltage tuner by a voltage inputted to the non-inverting terminal (+).
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29. A transmission power control apparatus for a mobile terminal, comprising:
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an error amplifier which generates a control voltage based on a comparison between a transmission gain control signal and a power mode signal; and a non-linear circuit which generates a reference signal for a power amplifier module of the terminal based on the control voltage, said reference signal controlling an amplification degree of the power amplifier module, wherein the non-linear circuit includes; a bipolar transistor having a first terminal coupled to receive the control voltage from the error amplifier and a second terminal coupled to a supply voltage; and a first resistive circuit connected to the transistor in parallel, wherein a node coupling the first resistive circuit to a third terminal of the transistor outputs a signal proportional to the reference signal for the power amplifier module. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37)
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38. A method for controlling transmission power in a mobile terminal, comprising:
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comparing a transmission gain control signal to a power mode signal; generating a control voltage based on a difference between the transmission gain control voltage and the power mode signal; applying the control voltage to a non-linear circuit, which generates a reference signal for a power amplifier module; and controlling an amplification degree of the power amplifier module based on the reference signal, wherein the non-linear circuit includes; a bipolar transistor having a first terminal coupled to receive the control signal from the error amplifier and a second terminal coupled to a supply voltage; and a first resistive circuit connected to the transistor in parallel, wherein a node coupling the first resistive circuit to a third terminal of the transistor outputs a signal proportional to the reference signal for the power amplifier module. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45, 46)
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Specification