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. 01, 2001
Filed:
Jul. 19, 1994
Fuk Ho P. Ng, Dallas, TX (US);
Shivaling S. Mahant-Shetti, Richardson, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
Two thermometer coded words having a most significant byte (MSB) and a least significant byte (LSB) are subtracted, and a check detects a borrowing condition. A first borrowing condition is detected if word B MSB is greater than word A MSB (,), and word A LSB is greater than word B LSB (,). In such a case a borrow (,) must take place on word B MSB. A second borrowing condition is detected when the word A MSB is greater than the word B MSB (,) and the word B LSB is greater than the word A LSB (,). In this instance, a borrow (,) should take place on word A MSB through a shift right function. After borrowing, a subtraction (,) takes place by exclusive-or'ing word A and B MSBs. The result is reconstructed (,) through a shift right process into proper thermometer code format. If a borrowing condition exists, an appropriate LSB is translated (,) before an LSB subtraction process (,) takes the resulting word A and word B LSBs and exclusively-or's them together. The result is reconstructed (,) through a shift right rotate left process to place the LSB in proper thermometer code format.