This is the pocket headphone amplifier circuit designed by Chu Moy. The circuit is based op-amp OPA134 and supplied using 9V battery which splitted to become dual polarity output (+)4.5V ; ground and (-)4.5V.
Originally, this circuit using the OPA132 op-amp, but it has been discontinued, so OPA134 is the better alternative for OPA132. The OPA134 is the audio-specific version of the OPA132 and will work identically in this circuit. It was selected for its excellent specs: FET inputs for high input impedance and low offset current, 8 MHz bandwidth, 20V/uS slew rate, ultra low noise, ultra low distortion, etc. It has fine PSRR (power supply rejection) numbers, can run on as little as ±2.5V (very important in a portable design) and includes built-in current limiting.
Detailed explanation for this pocket headphone amplifier circuit, visit this page: http://gilmore2.chem.northwestern.edu/projects/cmoy2_prj.htm
0 comments:
Post a Comment