US 7,548,110 B2 · Power amplifier and method for reducing common noise of power amplifier

Abstract

A power amplifier including a delta-sigma modulation module, a differential programmable dead-time-control module, and an output stage module is provided. The delta-sigma modulation module integrates and quantizes an error between a differential-mode input signal and an output signal to generate a first and a second mean signal. The differential programmable dead-time-control module includes a first and a second dead-time-control module which respectively generate a first and a second signal corresponding to the first mean signal and a third and a fourth signals corresponding to the second mean signal through logic calculations. The differential programmable dead-time-control module determines a dead time between the first signal and the second signal according to a first control signal and a dead time between the third signal and the fourth signal according to a second control signal. The output stage module generates the output signal according to the first, second, third, and fourth signal.

Claims21

Dependent claims

A power amplifier, comprising:

a delta-sigma modulation module, receiving a differential-mode input signal, integrating and quantizing an error between the differential-mode input signal and an output signal, and generating a first mean signal and a second mean signal;
a differential programmable dead-time control module, coupled to the delta-sigma modulation module, the differential programmable dead-time control module receiving the first mean signal and generating a first signal and a second signal corresponding to the first mean signal through logic calculation, and the differential programmable dead-time control module receiving the second mean signal and generating a third signal and a fourth signal corresponding to the second mean signal through logic calculation and the differential programmable dead-time control module adjusts dead-time corresponding to the first mean signal and the second mean signal respectively;
and
an output stage module, coupled to the differential programmable dead-time control module, the output stage module being controlled by the first signal, the second signal, the third signal, and the fourth signal to generate the output signal to drive a load.

1 more element

A method for reducing common noise of a power amplifier, comprising:

receiving a differential-mode input signal;
integrating and quantizing an error between the differential-mode input signal and an output signal to generate a first mean signal and a second mean signal;
generating a first signal and a second signal corresponding to the first mean signal through logic calculation, wherein a dead time between the first signal and the second signal is determined according to a first control signal;
generating a third signal and a fourth signal corresponding to the second mean signal through logic calculation, wherein a dead time between the third signal and the fourth signal is determined according to a second control signal;
and
controlling the power amplifier to generate the output signal according to the first signal, the second signal, the third signal, and the fourth signal.

3 more elements

Dependencies are inferred from the claim text.

Power amplifier and method for reducing common noise of power amplifier

Life of this patent

Power amplifier and method for reducing common noise of power amplifier

Life of this patent

Abstract

Claims21