Shahriar Posted December 22, 2006 Report Share Posted December 22, 2006 HiI have designed this power amplifier. I think it is a little bit different with NormalPA, because I have tried to use two Voltage-Current converter to drive power output transistors to reduce zero-crossing.I have attached the schematic to tell me anything wrong about the topology I have used.I have not draw all things needed in details. Just about Topology.Let me explain a little more:the Input signal will be converted to Current around U1A and U1B. (one Sink current and one Source current)a feedback is there around R7 & R13 to set the total gain about 40. 1- if the input voltage is greater than zero U1A and q3 sink current from the base of Q1. I(sink) = Vi/R5)2- if the input is negative U2A and Q2 source current. Isource = Vi/R73- U2A veries the voltage to control the output current through speaker.The Marked resistor values (R5 & R8) will be determined depending on desired Output power and speaker ohms.ThanX in advanceShahriarCurrentPA.pdf Quote Link to comment Share on other sites More sharing options...
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.