Unity-gain frequency-independent precision phase-shifter
Electronics Letters(1984)
摘要
The letter describes an operational amplifier circuit which gives a constant (±0.1°) phase shift and a constant (±0.1%) unity gain to a sinusoidal signal, over a frequency band of range ±2%. The circuit incorporates two standard phase-shifters with different characteristics, deployed so that their phase errors mutually cancel as the frequency deviates from its central value. The device has been us...
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关键词
electric current measurement,operational amplifiers,phase shifters
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