FET simple mixer (CB8760E)

We found this simple mixer in a 90s Radio Electronics. The used FETs are still common. The inputs are high impedance.

Preamplifier for 30 MHz (CB10057E)
This low noise preamplifier has a gain of 19 dB in the 30 MHz band. The circuit is from the 80s....
Sensor Amplifier with Strobe (Cb19988E)
The purpose of the strobe circuit in this sensor amplifier is to reduce consumption. The circuit is...
Photodiode Amplifier 741 (CB14644E)
The amplifier gain shown in the figure is given by R1. The circuit is valid for other photodiodes and is...