Iam designing Dual mode Oscillator using SC-CUT crystal in C-mode.I have two frequencies ie.,one is direct 3rd overtone 10.000 500 MHz and another one is fundamental frequency x3 (3.333 000MHz x 3 = 9.999 999MHz).
I want to mix these two frequencies and i need beat frequency(difference frequency) of 500Hz.Pls suggest me suitable mixer type for this low frequency.Is it necessary low pas filter after mixer?
A ‘D’ flip-flop can be used as a mixer. The circuit receives inputs both from two oscillators and produces an output which is the difference of the two input frequencies.
Here is a schematic example that use a flip-flop as a mixer: