< Phase-Shift Oscillator The amplifier must supply enough gain to compensate for losses. The overall gain must be unity. The RC networks provide the necessary phase shift for a positive feedback. For the phase-shift network, the frequency at which the phase shift is exactly 180°. 1 2πRC√6 At this frequency, B= 1/29 Oscillation Condition A>=29 Feedback network Electronic Devices and Circuit Theory (11th edition) C >