Current to voltage converter (CB7332E)

This circuit is from a Popular Electronics from the 90s. The integrated circuit admits equivalents that must be tested.

Multi-Feedback Band Pass Filter (CB4025E)
This circuit is from the Motorola Linear Databook published in 1990. The circuit for 1 kHz can be...
ICS 52000 Low Noise Microphone with Digital TDM Output
August 2017 - Mouser Electronics is announcing the availability of TDK ICS-52000 microphones with...
Tamper Proof Vehicle Alarm (CB4871E)
This interesting automotive alarm was found in an English publication from the 1980s. The circuit...