Electronic line stretcher

Details Electronic line stretcher Electronic line stretcher

1975-07-07

1977-05-17

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307232, 328134, 331 25, 331 30, H03K 520, H03B 306, H03K 906

Patent

active

040244601

ABSTRACT:
A network analyzer is provided with an electronically variable phase shifter in the IF portion of the reference channel, and the phase shifter is connected to sweeping signal generator (sweeper) driving the device under test. As the output frequency of the sweeper changes, the control signal to the phase shifter changes the phase shift in the IF portion of the reference channel, compensating for phase differences between the test and reference signals due to different line lengths in the two signal paths. The electronically variable phase shifter may comprise a linear phase shifter such as a phase lock loop along with a frequency multiplier and down converter to multiply the phase shift produced by the phase shifter.

REFERENCES:
patent: 3267357 (1966-08-01), Ravenhill et al.
patent: 3277390 (1966-10-01), McLin
patent: 3393380 (1968-07-01), Vaughan et al.
patent: 3475626 (1969-10-01), Holzman et al.
patent: 3577088 (1971-05-01), Goggins, Jr.
patent: 3621405 (1971-11-01), Carlsen
patent: 3775695 (1973-11-01), Hill
patent: 3777276 (1973-12-01), Klein
patent: 3852681 (1974-12-01), Underhill
Noble et al., "Electrical Phase Shift Multiplier"; The Review of Technical Instruments; vol. 36, No. 7, pp. 971-973; July 1965.

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