A phase-locked-loop phase-shifter for band-limited signals

Details A phase-locked-loop phase-shifter for band-limited signals A phase-locked-loop phase-shifter for band-limited signals

Mar 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977raee...47..117r&link_type=abstract

Radio and Electronic Engineer, vol. 47, Mar. 1977, p. 117-120.

Computer Science

Performance

1

Network Synthesis, Phase Locked Systems, Phase Shift Circuits, Radio Astronomy, Radio Interferometers, Signal Mixing, Bandwidth, Performance Prediction, Radiant Flux Density, Radiation Measurement, Signal Detection, Voltage Regulators

Scientific paper

The need for a voltage-controllable phase-shifter frequently arises in radio astronomy interferometry work. This paper describes a particular implementation of such a phase shifter in which a phase-locked loop of special design is used as the principal phase-shifting element. Relative phase-shifting of a band-limited signal is accomplished by mixing the signal with a phase-shifted local oscillator output derived from the phase-locked loop. Details of circuit operation, construction and performance are presented. Particular attention is devoted to obtaining a wide range of phase shifts. The paper concludes with a description of three specific applications of the circuit to a radio source flux density measurement program.

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