Telecommunications – Transmitter and receiver at same station – With frequency stabilization
Patent
1986-12-08
1989-02-28
Masinick, Michael A.
Telecommunications
Transmitter and receiver at same station
With frequency stabilization
455 73, 455 84, 455 86, 455 87, H04B 138, H04B 154
Patent
active
048093556
ABSTRACT:
A method for operating a transmitting/receiving circuit for ultrasonic signals includes the steps of producing a carrier frequency by a voltage-controlled oscillator having an output frequency controlled in accordance with a temperature dependency of an inherent frequency of the transducer, modulating the carrier frequency, applying the modulated carrier frequency in a transmitting mode to energize an ultrasonic transducer to produce ultrasonic transmission signals, switching from the transmitting mode to a receiving mode, applying output signals from the transducer representative of received ultrasonic signals to a phase-locked-loop circuit using the voltage-controlled oscillator whereby the phase-lock-loop circuit is automatically matched to a frequency of the received signals. An apparatus utilizing this method includes a transmitting/receiving transducer, a phase-locked-loop having a voltage-controlled oscillator, a modulator for applying a modulated carrier frequency to the transducer in a transmitting mode, a transmitting circuit for selectively applying an output from the oscillator as a carrier frequency to the modulator to produce the modulated carrier frequency, a receiving circuit for selectively applying an output from the transducer in a receiving mode for receiving reflected signals to an input of the phase-locked-loop and a temperature responsive element arranged to control the voltage-controlled oscillator at a frequency matched to an inherent frequency of the transducer.
REFERENCES:
patent: 2846572 (1958-08-01), Elliott
patent: 3117241 (1964-01-01), Paynter et al.
patent: 4095183 (1978-06-01), Kakigi
patent: 4254504 (1981-03-01), Lewis et al.
Halista Mitchell J.
Honeywell Regelsysteme GmbH
Masinick Michael A.
Medved Albin
LandOfFree
Method for operating a transmitting/receiving circuit and an app does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for operating a transmitting/receiving circuit and an app, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for operating a transmitting/receiving circuit and an app will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1375346