Switching amplifiers into and out of circuits with reduced output noise
US5764103A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1996 |
| Grant date | Jun 9, 1998 |
| Priority date | — |
| Expiry date | Jul 17, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/303
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An insubstantial amount of noise results at the output of a circuit when an output of a primary amplifier is disconnected from and reconnected to the circuit in which is operating. The primary amplifier is placed temporarily in a muting configuration. A secondary amplifier permanently in a muting configuration is connected in parallel with the primary amplifier. The output of the primary amplifier then is disconnected from a circuit node to which it is attached. The primary amplifier may then be taken out of its muting configuration. After, for example, configuring the primary amplifier as a comparator and calibrating its dc-offset voltage, the primary amplifier is placed back into a muting configuration. The secondary amplifier then is disconnected from the primary amplifier. The primary amplifier may subsequently be taken out of muting configuration to resume its normal function in the circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.