Power stage with increased output dynamics
US4916408A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 28, 1988 |
| Grant date | Apr 10, 1990 |
| Priority date | — |
| Expiry date | Nov 28, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/211
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An improved power stage with increased output dynamics. The stage comprises a power amplifier having a first inverting input, a second non-inverting input, an output to be connected to a load and a feedback network comprising a first resistor connected between the inverting input and the output of the power amplifier and a second resistor connected between the first inverting input and a first line set to a first reference voltage by means of a voltage generator with preset values. The stage furthermore comprises an input voltage generator generating an input voltage signal to be amplified and connected between the second non-inverting input and a second line set to a second reference voltage different from said first reference voltage. In order to increase the output dynamics, in particular in the case of low power supply voltage, said voltage generator arranged between the second resistor and said input voltage generator, and generating a voltage which is variable in inverse proportion to the input voltage signal, with respect to the second reference voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.