function generator - made-to-measure waveforms

function generator elektor december 1984 ; b: function generator made-to- measure waveforms Technical specifications • Frequency range: 1 Hz...110 kHz, divided into five decades • External-voltage controlled: 0.1.. .10 V on the VCO input gives a frequency range of 1 ...100, input impedance is 1 MQ ■ Waveforms: sine, triangle, square ■ Harmonic distortion on the sinewave: 0.5% • DC OUT: all waveforms, amplitude 100 mV...10 Vpp, d.c. level adjustable from —5V to +5V, output impedance is 50 Q, short-circuit protected • AC OUT: all waveforms, amplitude 10 mV...1 Vpp, frequency range 0.1 Hz...110 kHz (-3 dB), output impedance is 600 Q, short circuit protected • SYNC OUTPUT: square wave, amplitude 500 mVpp, no d.c. voltage component pres- ent, output impedance is 1 kQ, short circuit protected, shut-off impedance.-> 10 kQ Although the `simple function generator" described in January 1978 was (and is) a popular project, the time has come for it to be replaced. Over the yea...