Mini solar organ (CB20506E)

This circuit was found in an old documentation and can be powered by a solar panel. The touch resistor is a nichrome wire.

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...