US 12,603,665 B2 · Transmitter and related gain control method

Abstract

A transmitter includes an analog transmission circuit, a power amplifier, a voltage detector, a comparator, and a control circuit. The analog transmission circuit is configured to provide a first gain to a first analog signal, so as to generate a second analog signal. The power amplifier is configured to provide a second gain to the second analog signal, so as to generate an output signal to an antenna. The voltage detector is configured to detect a voltage level of the second analog signal. The comparator is configured to generate an indication signal according to the voltage level and a reference level. The control circuit is configured to adjust the first gain of the analog transmission circuit according to the indication signal.

Claims18

Dependent claims

A transmitter, comprising:

an analog transmission circuit, configured to provide a first gain to a first analog signal so as to generate a second analog signal;
a power amplifier, configured to provide a second gain to the second analog signal so as to generate an output signal to an antenna;
a voltage detector, configured to detect a voltage level of the second analog signal;
a comparator, configured to generate an indication signal according to the voltage level and a reference level;
and
a control circuit, configured to adjust the first gain and the second gain according to the voltage level of the second analog signal, a power of the output signal, and the indication signal,
wherein when the voltage level is greater than the reference level, the indication signal has a first level, configured to indicate the control circuit to decrease the first gain.

4 more elements

A gain control method, configured to control a first gain of an analog transmission circuit and a second gain of a power amplifier in a transmitter, wherein the analog transmission circuit provides the first gain to a first analog signal so as to generate a second analog signal, and the power amplifier provides the second gain to the second analog signal so as to generate an output signal, the gain control method comprising:

adjusting the first gain and the second gain according to a voltage level of the second analog signal, a power of the output signal and a temperature of the transmitter, comprising:
generating an indication signal according to the voltage level and a reference level;
and
adjusting the first gain according to the indication signal,
wherein the output signal is outputted through an antenna of the transmitter.

2 more elements

Dependencies are inferred from the claim text.

Transmitter and related gain control method

Life of this patent

Transmitter and related gain control method

Life of this patent

Abstract

Claims18