PHILIPS TDA1302T Data ampli er laser supply circuit for CD player read only optical systems handbook

This document is about the preliminary specification of TDA1302T data amplifier and laser supply circuit for CD player and read only optical systems. The device contains 6 amplifiers which amplify and filter the focus and radial diode signals and provides an equalized RF signal suitable for single or double speed mode; the mode can be switched by means of the speed control pin. The device can accommodate astigmatic, single foucault and double foucault detectors and can be applied to all N-sub laser/monitor diode units even though the circuit has been optimized for the Philips CDM1.

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