RC Phase Shift Oscillator Calculator

Brief for RC Phase Shift Oscillator:

This circuit is commonly used to create LFO (low frequency oscillator) oscillators, for frequencies ranging from a few Hertz to a few Kilo-Herts..

For oscillation to occur in the Hertz range, use capacitances in the range of micro-Henry units. For the Kilo-Hertz range, use capacitances of a few nano-Henry units.

HOW TO IMPLEMENT (Tested from 50Hz to 500KHz):

First see the shematic image below.

The collector resistance value is RC=ZNet and the current is IC=VCC/Znet, for the base current IB=IC/Hfe (Hfe transistor gain), and the base resistance (RB) becomes (VCC-0.8)/IB.

To calculate the value of the coupling capacitor (C-Coupling): Use the capacitive reactance calculator, using this oscillation frequency, and the reactance the value of ZNet.

NOTE: If there is a large discrepancy in the oscillation value, adjust C-Coupling gradually.

DON´T FORGET:Start simulation with DC Power Supply set to 0 Volt.

Brief for RC Phase Shift Oscillator Calculator:

Calculate the value of (F) frequency, R (resistance) or C (capacitance) by filling in two of the available fields, leaving the value of the desired element blank.