Finely variable delay line incorporating coarsely and finely var

Details Finely variable delay line incorporating coarsely and finely var Finely variable delay line incorporating coarsely and finely var

1986-02-19

1987-08-11

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Delay lines including long line elements

333139, 333140, 333161, H03H 734, H01P 900

Patent

active

046864954

ABSTRACT:
This finely variable delay line includes a first variable delay line element the delay time provided by which can be relatively coarsely varied, and a second variable delay line element the delay time provided by which can be relatively finely varied, connected in series with the first variable delay line. A reflection circuit is constituted between an element included in the second variable delay line and another element of the construction, the reflection circuit reflecting back a signal towards the element of the second variable delay line. Although some slight mismatching is in fact present, such mismatching is quite negligible in practice, and this variable delay line can be very finely adjusted by steps of as little as 0.5% of its total range or less.

REFERENCES:
patent: 3114121 (1963-12-01), Jordan
"Constant Delay Lines, Data Sheet No. 102", Control Electronics, Huntington Station, L.I., N.Y., Received in U.S. Patent Office, Mar. 25, 1959; 4 pages.
"Step Variable Delay Lines", Advance Electronics Co., Inc., Passaic, N.J., Received U.S. Patent Office, Mar. 1956; 1 sheet.
"Continuously Varible Time Delay", Advance Electronics Lab, Inc., Passaic, N.J. Received U.S. Patent Office, Mar. 1956; 1 sheet.

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