The purpose of the strobe circuit in this sensor amplifier is to reduce consumption. The circuit is from old documentation (1970s), but the idea can be used in modern applications.
This circuit is from 1989 documentation. It uses the TDA2002 as a modulator and the unusual power...
This configuration is suggested by Mullard (Philips) in an old manual of 555 integrated circuits....
The figure shows how to use a CMOS amplifier as a crystal-controlled oscillator. The circuit is...