Microwave acoustic delay line

Claim 2

A delay line having an input terminal and an output terminal for providing a predetermined delay for input signals, comprising: sampling means coupled to said input terminal for sampling a predetermined portion of said input signal; detector means coupled to said sampling means for detecting and converting said sampled input signal to a D.C. voltage signal; first delay means coupled to said detector means for delaying said D.C. voltage signal, for said predetermined delay; second delay means providing a delayed portion and an undelayed portion of said input signal; signal directing means having a first terminal coupled to said sampling means and a second terminal coupled to said second delay means, said directing means providing a conductive path for said input signal from said sampling means to said second delay means; and switching means coupled to said first delay means, a third terminal of said directing means and said output terminal, said switching means operating in response to said delayed D.C. voltage signal to selectively provide a signal absorbing termination for said undelayed portion of said input signal and a conductive path to said output terminal for said delayed portion of said input signal.

Claim 3

A delay line according to claim 1, wherein said sampling means is a directional coupler.

Claim 4

A delay line according to claim 1, wherein said detector means is a diode detector.

Claim 5

A delay line according to claim 1, wherein said first delay means is a video delay line.

Claim 6

A delay line according to claim 1, wherein said second delay means is an acoustic delay means.

Claim 7

A delay line according to claim 5, wherein said acoustic delay means is a one port microwave acoustic bulk delay line.

Claim 8

A delay line according to claim 1, wherein said switching means is a single pole double throw switch operating in response to said delayed D.C. voltage signal and having an input terminal coupled to said third terminal of said directing means and first and second selectable output terminals, said switch having said second output terminal connected to said signal absorbing termination and said first output terminal connected to a reflective termination for said delayed portion of said input signal whereby, said switch provides a conductive path for said delayed portion of said input signals from said switch input terminal to said reflective termination in the presence of said delayed D.C. voltage signal and a conductive path for said undelayed portion of said input signals from said switch input terminal to said signal absorbing load at all other times.

Claim 9

A delay line according to claim 1, wherein said signal directive means is a four port circulator means directing said input and said delayed portion of said input signals along predetermined non-reciprocal paths, said circulator means having a first terminal coupled to said sampling means, a second terminal coupled to said second delay means, a third terminal coupled to said switching means and a fourth terminal for coupling out said delayed portion of said input signal.

Claim 10

A delay line having an input terminal and an output terminal for providing a predetermined delay for input signals transmitted between said input and output terminals, comprising: sampling means coupled to said input terminal for sampling a predetermined portion of said input signal; detector means coupled to said sampling means for detecting and converting said sampled input signal to a D.C. voltage signal; first delay means coupled to said deteCtor means for providing said predetermined delay for said D.C. voltage signal; second delay means for delaying said input signal for said predetermined delay; directive means having first, second, third and fourth terminals, said first terminal being coupled to said sampling means and said second terminal being coupled to said second delay means, said directive means providing a directive non-reciprocal path for said input signal to said second terminal of said directive means; and switching means coupled to said first delay means and said third terminal of said directive means, said switching means operating in response to said delayed D.C. voltage signal to selectively provide a signal absorbing termination for undelayed input signals reflected by said second delay means and a conductive path from said third terminal to said fourth terminal of said directive means for said delayed input signal.

Claim 11

A delay line having an input terminal and an output terminal for providing a predetermined delay for input signals transmitted between said input and output terminals, comprising: sampling means coupled to said input terminal for sampling a predetermined portion of said input signal; detector means coupled to said sampling means for detecting and converting said sampled input signal to a D.C. voltage signal; first delay means coupled to said deteCtor means for providing said predetermined delay for said D.C. voltage signal; second delay means for delaying said input signal for said predetermined delay; directive means having first, second, third and fourth terminals, said first terminal being coupled to said sampling means and said second terminal being coupled to said second delay means, said directive means providing a directive non-reciprocal path for said input signal to said second terminal of said directive means; and switching means coupled to said first delay means and said third terminal of said directive means, said switching means operating in response to said delayed D.C. voltage signal to selectively provide a signal absorbing termination for undelayed input signals reflected by said second delay means and a conductive path from said third terminal to said fourth terminal of said directive means for said delayed input signal.

Claim 12

In combination, an acoustic delay means which provides in response to an input signal applied thereto a first signal which is said input signal delayed a predetermined time period and a second signal which is a portion of said input signal undelayed by said delay means, means for applying said input signal to said delay means, means for sampling said input signal to provide a control signal and for delaying said control signal said predetermined time period, and means coupled to said acoustic delay means and to said sampling and delaying means to provide in response to said control signal and a signal absorbing termination for said second signal and an output path from said delay means to a utilization means for said first signal.

Claim 13

In combination, an acoustic delay means which provides in response to an input signal applied thereto a first signal which is said input signal delayed a predetermined time period and a second signal which is a portion of said input signal undelayed by said delay means, means for applying said input signal to said delay means, means for sampling said input signal to provide a control signal and for delaying said control signal said predetermined time period, and means coupled to said acoustic delay means and to said sampling and delaying means to provide in response to said control signal and a signal absorbing termination for said second signal and an output path from said delay means to a utilization means for said first signal.