Found in Radio Electronics from the 90s, this circuit has several outputs with different pulse times. The circuit is CMOS and can be powered by voltages from 5 to 15 V.
The transistor can be the BD135 and this circuit, found in a 1978 publication, can be powered by...
This second-order filter was found in a 1978 publication and can use common operational amplifiers like...
This circuit has a sensitivity of 2uW. We found it in documentation from the 1980s. The integrated...