Power amplifier integrated circuit with temperature and output power compensation mechanism
A technology of power amplifiers and integrated circuits, which is applied to amplifiers, amplifiers, high-frequency amplifiers, etc. with semiconductor devices/discharge tubes, and can solve the problems of limited influence and inability to effectively stabilize the RF output power of the radio frequency output signal.
Active Publication Date: 2010-12-22
RICHWAVE TECH CORP
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Problems solved by technology
However, changing the bias voltage Vc to the signal gain value g m1 ~ g mn The influence is limited, and the power of the RF output signal RFout cannot be effectively stabilized
Method used
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[0041] Please refer to Figure 4 , Figure 4 It is a functional block diagram of a power amplifier integrated circuit 400 in the first embodiment of the present invention. The power amplifier integrated circuit 400 includes a plurality of connection ports 401 a - 401 c , n-stage amplifying units OP1 - OPn, a bias circuit 410 , a temperature detection circuit 420 , and a gain adjustment circuit 440 . The input port 401a is used to receive a radio frequency input signal RFin, the output port 401b is used to provide a radio frequency output signal RFout, and the supply voltage input port 401c is used to receive a fixed bias voltage Vc. The bias circuit 410 includes n sets of current sources, which can respectively provide fixed operating currents IS1˜ISn to the n-stage amplifying units OP1˜OPn. The temperature detection circuit 420 and the gain adjustment circuit 440 form a temperature compensation circuit: the temperature detection circuit 420 can detect the temperature change...
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The invention discloses a power amplifier integrated circuit for amplifying a radio frequency input signal and generating a corresponding radio frequency output signal, which comprises a temperature detection circuit, a feedback circuit, a logic judgment circuit, a gain adjustment circuit and an amplification circuit, wherein the temperature detection circuit generates a temperature compensation signal according to an operation temperature; the feedback circuit generates a power compensation signal according to power change of the radio frequency output signal; the logic judgment circuit outputs compensation signals according to the temperature compensation signal and the power compensation signal; the gain adjustment circuit adjusts the level of the radio frequency input signal according to the compensation signals and generates a corresponding first-grade radio frequency signal; and the amplification circuit can amplify the first-grade radio frequency signal and generates the corresponding radio frequency output signal.
Description
technical field [0001] The present invention relates to a power amplifier integrated circuit, especially a power amplifier integrated circuit with temperature and output power compensation mechanism. Background technique [0002] In recent years, a power amplifier integrated circuit (PAIC) has been widely used in various wired or wireless communication devices. Please refer to figure 1 , figure 1 It is a functional block diagram of a power amplifier integrated circuit 100 in the prior art. The power amplifier integrated circuit 100 includes a plurality of connection ports 101 a - 101 c , n-stage amplifying units OP1 - OPn, and a bias circuit 110 . The input port 101a is used to receive a radio frequency input signal RFin, the output port 101b is used to provide a radio frequency output signal RFout, and the voltage supply input port 101c is used to receive a bias voltage Vc. The bias circuit 110 includes n sets of current sources, which can respectively provide fixed ope...
Claims
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IPC IPC(8): H03F3/213H03F1/30H03G3/20H03F3/19H04B1/00
Inventor 万光烈
Owner RICHWAVE TECH CORP