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:
May. 21, 2002
Filed:
Apr. 20, 2000
Brian Keith Russell, Limerick, IR;
Analog Devices, Inc., Norwood, MA (US);
Abstract
A resistive DAC ( ) comprises a digital input port ( ) and an analog output port ( ) on which analog resistance output values are outputted in response to corresponding digital input codes on the input port ( ). A decoding and control circuit ( ) selects appropriate resistors (R ) to (RN) from a resistor chain ( ) for providing the analog resistance output of the analog output port ( ). A register ( ) stores a transfer coefficient in binary code which can be read through the input port ( ) and by which each digital input code should be multiplied in order to produce an analog resistance output of predetermined value. The transfer coefficient in the register ( ) takes account of variations in internal circuit parameters which causes the analog resistance outputs on the output port ( ) to be less than they would in an ideal resistive DAC.