Circuit and method for calculating a logical combination of two input operands

US7342423B2 · kind B2 · utility

Assignee

• Infineon Technologies AG · DE

Inventors

• Antoine Degrendel · Munich, DE
• Winfried Kamp · Munich, DE

Key dates

• Filing date: Aug 8, 2006
• Grant date: Mar 11, 2008
• Expiry date: Aug 19, 2026

Classification

• Technology area (CPC G): Physics
• CPC primary: G06F21/70
• WIPO field: Basic communication processes
• WIPO sector: Electrical engineering

Abstract

A circuit for calculating a logical combination of two input operands includes a first input for receiving a first dual rail signal having data values of the first input in a calculation cycle and precharge values in a precharge cycle, a second input for receiving a second dual rail signal having data values of the second input in the calculation cycle and precharge values in the precharge cycle, and an output for outputting a third dual rail signal having result values in the calculation cycle and precharge values in the precharge cycle. Furthermore, the circuit has a logic circuit for determining the result values according to the logical combination from the data values of the first input and the second input and for outputting the result values in the calculation cycle at the output, and a precharge circuit designed to impress precharge values in the output already when precharge values are detected at a single input, or designed to terminate impressing the precharge values only when the first dual rail signal and the second dual rail signal have data values.