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. 26, 1983
Filed:
Oct. 08, 1980
Masao Hotta, Hachiouji, JP;
Kenji Maio, Tokyo, JP;
Norio Yokozawa, Fuchu, JP;
Hiromi Nagaishi, Hachiouji, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A digital-to-analog conversion system includes a digital-to-analog converter, a source of at least one set of digital input signals and a signal for error compensation and a digital signal for error detection to the converter, a switch to selectively couple either the one set of digital input signals and the signal for error compensation or the signal for error detection to the converter, a clock to generate a switching signal having a predetermined period and duration which is coupled to control the switch, a distribution switch for selectively coupling the output of the digital-to-analog converter to two different terminals, receiving a control input from the clock, a sample and hold circuit to sample and hold the output of the digital-to-analog converter, a detector for detecting a linearity error in the digital-to-analog converter output signal when the digital signal for error detection is coupled as an input thereto, a memory for storing the output of the detector, a circuit to write the output of the detector into the memory, and a circuit to read the data from said memory and couple it as the signal for error compensation at the input to the digital-to-analog converter.