Frequency-independent analogue phase-shift network technique using field effect transistors

Al-Araji, Saleh R.; Allos, Janan E.; Khalis, K.N.

doi:10.1049/ree.1980.0014

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1981

1989

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“…Another technique is to utilize the property of the fieldeffect transistor (FET) as an Ohmic resistance channe1,whose value is a function of the gate to source voltage (Al-Araji et a/. 1980, Allos andAl-Araji 1981). However the technique introduced by Pedar and Sankakanarayanan (1971) can produce a phase shift of only 7112.…”

Section: Introductionmentioning

confidence: 99%

Wide-band π/2 phase shifter using a stepped sweeping dual phase-locked loop technique

K.AL-Shamma

1989

International Journal of Electronics

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A wide-band n/2 phase shifter based on stepped sweeping phase-locked loops (PLLs) is introduced and constructed. Results indicate that the system can work over a wide range of input frequencies limited only by the gain and saturation of the voltage-controlled oscillator (VCO) of the PLLs. For a noise-free signal, the phase error between the input and the n/2 phase-shifted output is 3" and it is constant regardless of the input frequency. The system can be modified to produce any phase shift from 0 to n with the same performance.

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Section: Introductionmentioning

confidence: 99%