This is 60Hz calibration frequency standards for digital clock. As 50hz or 60hz frequency generator at TP 3.579MHZ. power supply 12V.Out put Frequency 60HZ [...]
This is a sample pulse generator using op amp. We often use 555 timer to build a simple pulse generator. The op amp is also easy in oscillator form. More!
This is Phase locked oscillator circuit,100Hz-10KHz square wave, the other circuit one interesting. The CMOS IC is selected to this job will be Phase Lock Loop IC is CD4046 [...]