Switching matrix crosspoint
USRE35483E · kind E · reissue
Assignee
Inventor
Key dates
| Filing date | Jun 30, 1994 |
| Grant date | Mar 25, 1997 |
| Priority date | — |
| Expiry date | Jun 30, 2014 |
Classification
- Technology area (CPC —)General
Abstract
A crosspoint for a switching matrix constituted by enhanced P-channel and N-channel MOS transistors. Each input line conductor (Ii1 and Ii2) is connected to an input of a first differential amplifier (M3, M4), each leg of which is associated by a current mirror circuit to a first current source (M9, M10, M11) enabled by a selection input (Sij) of the crosspoint. The outputs of the first differential amplifier are connected to a second differential amplifier (M1, M2) fed by a second current source (I) common to all the crosspoints of a same column. The outputs of the second differential amplifier are connected to the pair of conductors (Oj1, Oj2) of an output column, an extremity of this column being connected to the high voltage source (Vdd) through a resistor (R).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.