Suggested by Siliconix in documentation from the 90s, this circuit can present gains of digitally selected by the input going from 1 to 1000. The circuit can be adapted to work as a shield.
This circuit can be implemented with either TTL or CMOS logic. The speed depends on the logic used...
This is the receiver for the CB18476E, but it can be used with other transmitters found on the...
With a 1 500 uFcapacitor this timer can reach times up to one hour. The capacitor must be of good...