741 Filter (CB24265E)

The 1 kHz tuned filter shown uses a 741 op-amp. The components can be re-scaled to suit the desired frequency.

Dalayed Turn-On Gate (CB123)
This circuit can be used to add a delay to a logic signal as shown by the input and output...
Security System (CB24301E)
Found in the April 1974 issue of Radio Electronics magazine, this circuit is based on CMOS...
Low Output Impedance Preamplifier (CB4911E)
This circuit converts a high impedance signal into low impedance. The circuit has unit gain and...