Voltage generating circuit and D/A converter

Details Voltage generating circuit and D/A converter Voltage generating circuit and D/A converter

1999-12-10

2000-09-12

Nguyen, Matthew

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

341144, G05F 316, H03M 166

Patent

active

061182621

ABSTRACT:
A voltage dividing circuit accounts for resistance caused by switching elements and wires in order to provide accurate digital to analog conversion. The voltage dividing circuit includes a first voltage dividing circuit that divides a voltage between first and second reference power supply voltages and generates an output signal having a divided voltage. The first voltage dividing circuit includes first, second, and third impedance elements connected in series between the first and second reference power supplies. The first and second impedance elements are connected to the first and second power supplies, respectively, and the third impedance element is connected between the first and second impedance elements. A first current source is connected to a first node between the first and third impedance elements and a second current source is connected to a second node between the second and third impedance element. The first and second current sources provide first and second control currents, respectively, which maintain the potential difference between the first and second nodes substantially constant.

REFERENCES:
patent: 3997892 (1976-12-01), Susset
patent: 4638303 (1987-01-01), Masuda et al.
patent: 5283579 (1994-02-01), Tasdighi et al.
patent: 5745065 (1998-04-01), Wu
patent: 5952948 (1999-09-01), Proebsting

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