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PSRR for Purepath Digital Audio Amplifiers
https://www.ti.com/lit/an/slea049/slea049.pdf
PurePath Digital audio amplifier technology is a direct high-powerPCM-to-PWMconverter without feedback; this requires adequate decoupling and an adequate power supply to achieve good performance. The power-supplyvoltage would normally be regulated because the H-bridgeis switching the supply level
Audio amplifier power supply design - Part 3: Power …
https://www.edn.com/audio-amplifier-power-supply-design-part-3-power-supply-rail-rejection/
The standard op-amp definition of PSRR is the decibel loss between each supply rail and the effective differential signal at the inputs, giving a figure independent of closed-loop gain. However, here I use the decibel loss between rail and output, in the usual non-inverting configuration with a C/L gain of 26.4 dB.
Measuring PSRR with AP2700 - Audio Precision
https://www.ap.com/technical-library/measuring-psrr-with-ap2700/
Power Supply Rejection Ratio (PSRR) is a measure of a device’s ability to reject noise from the supply used to power it. It is defined as the ratio of the change in supply voltage to the corresponding change in output voltage of the device.
A high PSRR Class-D audio amplifier IC based on a self ...
https://ieeexplore.ieee.org/abstract/document/5619820/
Abstract: In a wide range of applications, audio amplifiers require a large Power Supply Rejection Ratio (PSRR) that the current Class-D architecture cannot reach. This paper proposes a self-adjusting internal voltage reference scheme that sets the bias voltages of the amplifier without losing on output dynamics.
Audio power amplifier using in cellular phone with ...
https://www.researchgate.net/publication/4172044_Audio_power_amplifier_using_in_cellular_phone_with_improved_PSRR
The class D amplifier achieves up to 82dB of power supply rejection ratio (PSRR), more than 95dB of signal-to-noise ratio (SNR) over the entire audio band, and 0.02% of total harmonic distortion ...
Understand why conventional power-supply rejection-ratio ...
https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/6/PSRR_2D00_Open-Loop-Vs-Closed-Loop.pdf
on the amplifier’s audio performance. Historically, power-supply rejection ratio (PSRR) has been an excellent measurement of an amplifier’s ability to reject supply noise from its output. However, with the ever-increasing presence of Class-D amplifiers and …
MAX4298 Ultra-High PSRR Stereo Drivers + Microphone …
https://www.maximintegrated.com/en/products/analog/audio/MAX4298.html
Ultra-High PSRR Microphone Amp ; 100mA, 3.3V Linear Regulator ; 93dB typ PSRR at 20kHz Operates Directly from Noisy Digital Supplies ; Clickless/Popless Power Up, Power Down, Mute and Unmute ; PC99 Compliant Output Drivers: Better than 1V RMS Output into 16Ω Load and 1.5V RMS and 0.0008% THD+N into 10kΩ Load ; PC99-Compliant Microphone Amplifier:
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