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The RC phase-shift circuit with unchanged Output amplitude

2014-11-04 12:51  
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The RC phase-shift circuit with unchanged Output amplitude
The most commonly used phase shifter phase difference is 90 °. Shown in Figure 1, in the RC phase shift circuit, even the amplitude is allowed down to 3dB, phase shift quantity is 45 °, as in the OP amplifier circuit shown in Figure 1, which is characterized by the phase shift of 0 to 180 °, 180 °to 0 , and the output amplitude does not depend on input frequency. The diagram shows the basic of RC phase circuit, the inverting amplifier of the gain A =- 1. This RC circuit can be connected to the non-inverting input terminal to decide the feedback resistance of inverting gain. If they are the same resistance value, its value can be chosen freely, actually, it is typically chosen to be 10kΩ.