meindert.norg Posted March 17, 2011 Share Posted March 17, 2011 LS, The Clipper manual suggests: DAC Outputs Power Supply 0.3A @ +12 to +15V (4.5W) 0.25A @ -12 to -15V (3.8W) for the DAC (=PWM) Outputs Power Supply. My question: Are these +/-12 or +/-15 V used directly for the PWM H-bridge (and thus determine the maximal and minimal output voltage, and ultimately the servo-loop-gain) or does the Clipper have a 10 V regulator on board that limits the actual PWM output voltage to +/- 10 V? Thank you, Regards, Meindert Link to comment Share on other sites More sharing options...
curtwilson Posted March 17, 2011 Share Posted March 17, 2011 The output voltages are not proportional to the supply voltages. The op-amps in the output stage take the 5V digital PWM signals, filter them and amplify them with a fixed gain to obtain the +/-10V output. (Our "true DAC" output stages work the same way, amplifying the DAC voltage output with fixed gain regardless of the [legal-range] supply voltage.) These are not H-bridge topologies like amplifiers. This circuitry is simply a very cost-effective way of getting an analog output voltage proportional to a command number. Link to comment Share on other sites More sharing options...
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