NOISE GENERATOR
Sometimes there is a need for a noise generator: this will work well in the audio range and, without the 680pF capacitor, will extend in the radio frequency range up to 20-30MHz. Voltage output may vary from 1Vpp to several volts depending on the type of zener used, older types have generally a higher noise; the zener voltage will influence the output level as well: the higher the voltage the higher the output level. Adjust the 1k pot for the required level.
