This circuit was obtained from an 80's EDN. The components used are still common. The circuit can be used as a shield and the frequency is approximately 775 Hz.
Microchip's EQCO62X20 6.25Gbps Asymmetric Coax Equalizer is a driver/equalizer chipset that forms...
When the sensor, an ordinary photo-transistor, receives light, the relay closes its contacts. The...
This input stage has unit gain but a high input impedance and low output impedance. The circuit is...