Analog/digital converter with automatic control for controlling

Details Analog/digital converter with automatic control for controlling Analog/digital converter with automatic control for controlling

1998-06-15

1999-11-30

Young, Brian

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

341118, H03M 166

Patent

active

059950323

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.

REFERENCES:
patent: 4523232 (1985-06-01), Kameda et al.
patent: 5594373 (1997-01-01), McClure et al.
patent: 5596297 (1997-01-01), McClure et al.

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