mif_tronics
New Member
when i was experimenting with adder amplifier circuit (using op amp UA741), i found something inadvertently .. when i put 2 AC sources, 40KHz(at about 8Vpp) and 36-44KHz(at about 1.4Vpp), i got the difference (beat)frequency between both sources. the output amplitude got smaller as the difference frequency became small.
as long as i know, difference frequency can be obtained by using modulator circuit. mid signal operation in nonlinier circuit yields 4 harmonic frequencies, f1, f2, f1-f2, and f1+f2. beat frequency can be obtained by filtering modulator output.
here i enclose the scheme.
i dont know how it could yield beat frequency as i know no nonlinier circuit there..is there anybody can help me?
as long as i know, difference frequency can be obtained by using modulator circuit. mid signal operation in nonlinier circuit yields 4 harmonic frequencies, f1, f2, f1-f2, and f1+f2. beat frequency can be obtained by filtering modulator output.
here i enclose the scheme.
i dont know how it could yield beat frequency as i know no nonlinier circuit there..is there anybody can help me?