Differential receiver with high common-mode range
US5043674A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1990 |
| Grant date | Aug 27, 1991 |
| Priority date | — |
| Expiry date | Apr 30, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/45479
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
This describes a differential amplifier for producing an output current proportional to the differential input voltage regardless of the common-mode input voltage and comprises two identical voltage networks coupled between differential voltage inputs and to common differential current outputs and a common bias circuit. The described transmission line circuit operates as a transmission line receiver circuit with a high degree of common-mode rejection that will work in a high input signal voltage environment and in which both true and complement outputs can be developed such that their signal responses are additive and their common-mode responses subtractive. The circuit thus converts the input voltage to an input current while isolating the sensing circuit from common-mode input voltages which may be in excess of the breakdown voltage of the individual components of the circuit and the power supplies powering up the sensing circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.