| 摘要 |
A pop-free single-ended output class-D amplifier includes: an input signal generator for generating an input signal; a power supply for supplying input power; a reference voltage generator for generating a reference voltage; a gain-adjustable stage for generating an amplified signal according to the reference voltage and adjusting a gain of the single-ended output class-D amplifier; a pulse width modulation module for outputting a pulse width modulation signal according to the reference voltage, the amplified signal, and the input power; a low-pass filter for low-pass filtering the pulse width modulation signal to generate an output voltage; and a logic controller for generating at least one control signal to control the reference voltage generator, the gain-adjustable stage, and the pulse width modulation module according to the input power, the reference voltage, and the pulse width modulation signal. |
| 主权项 |
1. A pop-free single-ended output class-D amplifier, comprising:
an input signal generator, for generating an input signal; a power supply, for supplying input power; a reference voltage generator, for generating a reference voltage; a gain-adjustable stage, coupled to the reference voltage generator and the input signal generator, for generating an amplified signal according to the reference voltage and adjusting a gain of the single-ended output class-D amplifier; a pulse width modulation (PWM) module, coupled to the reference voltage generator, the gain-adjustable stage, and the power supply, for outputting a pulse width modulation signal according to the reference voltage, the amplified signal, and the input power; a low-pass filter, coupled to the pulse width modulation module, for low-pass filtering the pulse width modulation signal to generate an output voltage; and a logic controller, coupled to the power supply, the reference voltage generator, the gain-adjustable stage, and the pulse width modulation module, for generating at least one control signal to control the reference voltage generator, the gain-adjustable stage, and the pulse width modulation module according to the input power, the reference voltage, and the pulse width modulation signal. |
