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:
Jan. 10, 1989
Filed:
Nov. 25, 1987
Einar O Traa, Portland, OR (US);
Tektronix, Inc., Beaverton, OR (US);
Abstract
A delay circuit generates an output signal that changes state in adjustably delayed response to a state change in an input signal, the delay being adjusted by a control signal. A series of buffers produces a plurality of delayed signals that change state at different times in response to state changes in the input signal. Amplifiers amplify the input and each delayed signal to produce output currents that are summed to provide a load current through load resistors, thereby providing the output voltage across the load resistors. The gain of each amplifier is adjusted in accordance with the control signal such that at least one and not more than two of the amplifiers have non-zero gain. The delay provided by the delay circuit is determined by the relative gains of the amplifiers.