Complete_function_generator

Published:2009/7/25 4:25:00 Author:Jessie | From:SeekIC

This circuit uses an XR-2206 to provide sine, triangle, and square outputs that can be AM/FM modulated. There are four overlapping frequency ranges selected by S1, as shown in Fig. 5-51B. The parts list, and a typical power supply, are shown in Figs. 5-51C and 5-51D respectively. Each tuning range can be varied over a 100:1 range. The sine/triangle output (P) can be varied from 0 to over 6 Vpp and appears as a 600-Ω source at the output terminal. The square-wave output (full M, or half L) is available for scope sync or to drive logic circuits. S1 selects range, S2 selects triangle or sine output, R9 sets dc-offset level of the triangle or sine output, R10 is adjusted for minimum harmonic content of the sine output. R11 is adjusted for optimum symmetry of the sine output. R12 sets the amplitude of the triangle/sine output, and should be a front-panel control, as should R13, which varies the frequency over the 100:1 range. To adjust for minimum distortion, monitor the output at P with S2 closed. Set R12 for a non-clipping maximum swing, then adjust R10 and R11 alternately for minimum distortion. Use a distortion meter, if desired, for final adjustment. Typical distortion is less than 1% from 1 Hz to 10 kHz, and less than 3% over the entire range.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Electrical_Equipment_Circuit/Complete_function_generator.html

Print this Page | Comments | Reading(3)