Pulsed directional doppler frequency domain output circuit

Details Pulsed directional doppler frequency domain output circuit Pulsed directional doppler frequency domain output circuit

1988-11-15

1989-12-19

Tarcza, Thomas H.

Communications, electrical: acoustic wave systems and devices

Echo systems

Speed determination

367 87, G01S 1502

Patent

active

048887447

ABSTRACT:
An electrical circuit to detect frequency domain information from ultrasonic signals that have been doppler shifted by motion of an object in the field of the ultrasonic beam. The circuit receives the doppler shifted signal, creates separate upper and lower sideband signals and compares the signals to a threshold level to produce digital transition pulses. The transmitter pulses are digitized to form pulses of uniform width and amplitude, whose frequency can be correlated to the object motion.

REFERENCES:
patent: 3233212 (1966-02-01), Auer, Jr. et al.

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