Frequency Doubler Circuit Using Op Amp. The a amp s output sees an inverting unity gain amp. Connecting the two inputs together with one diode reversed yields a hyperbola or indeed any superposition of hyperbolas.
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Typical op amp open loop gain bandwidth with without compensation. U1b d1 d2 r1 and r2 form an inverting half wave. Connecting the two inputs together with one diode reversed yields a hyperbola or indeed any superposition of hyperbolas.
I smell a multiplier.
The op amp mixer uses a square wave lo to flip the polarity of the rf input. I smell a multiplier. You can continually repeat this trick to obtain a frequency series of 2xf in 4xf in 8xf in and so on. Connecting the two inputs together with one diode reversed yields a hyperbola or indeed any superposition of hyperbolas.
