The usual preheating stage required for a tube light utilized a resonant tank which is now effectively replaced by a LC circuit suitable for driving LEDs.Because the current at the output is an AC, the need of a bridge rectifier at the output became imperative; this makes sure that current ...
The transistorized noise limiter circuit depicted in the diagram below can be used to solve this problem. Using potentiometer R3, both the signal and the noise are sent to amplifier Q1 in this circuit. These waveforms are amplified identically by transistor Q1, however diodes D1 and D2 restric...