The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 04, 1989
Filed:
Oct. 25, 1985
Fritz K Preikschat, Bellevue, WA (US);
Ekhard Preikschat, Bellevue, WA (US);
Other;
Abstract
An optical radar system comprising a transmitter (20), a receiver (22), a signal processor (200) and means (202, 206) for conveying a return signal from the receiver to the signal processor. The transmitter comprises a laser diode (50), an avalanche transistor (52), a capacitor (56) and a trigger generator (58). The laser diode, avalanche transistor and capacitor are arranged so as to minimize the combined effects of self-inductance and stray capacitance, thereby enhancing the speed and power of the optical pulses. The receiver comprises a reverse biased photodiode capacitively coupled to a dual gate GaAsFET. The transmitter and reciever are connected to the signal processor via coaxial cable (206) and cable amplifiers (202). The cable amplifiers are selected to compensate for the high frequency attenuation of the coaxial cable, such that the combined cable/cable amplifier transmission system has an essentially flat frequency response up to 1000 MHz.