Short Circuits : CD4049
The CD4049 is HEX Inverting buffer which you can use independently.
Clock Pulse generator
This circuit use to generate clock pulse which calculate the pulse rate follow in the pictire.Note that the pulse rate not depend on VDD.
Phase shift oscillator
Linear 10x Amplifier
The above circuit is a simple 10x linear amplifier which the gain determined by R2/R1.