Analog/digital converter with automatic control for controlling offset and gain
US5995032A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 15, 1998 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Jun 15, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/12
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The circuit, arranged between a source of higher voltage (VCC) and a source of lower voltage (ground), comprises an analog/digital converter (ADC) which has a resistor ladder (RL) connected between a top terminal (Vtop), a bottom terminal (Vbot) for supplying a series of reference voltages. According to the invention, this circuit includes a bias generator arrangement formed by a resistor (Rmid) connected on one side to the supply voltage source and on the other side to a reference current source (Ip0), and automatic control means (A2) for controlling a variable impedance element (T5) inserted between the connection (Vbot) at the bottom of the ladder and ground, which automatic control means are suitable for controlling the voltage (FS) at the terminals of the resistor ladder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.