Digital-to-analog converter and sensor-characteristic adjustment

Details Digital-to-analog converter and sensor-characteristic adjustment Digital-to-analog converter and sensor-characteristic adjustment

1996-10-18

1998-07-14

Gaffin, Jeffrey A.

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

327407, 341120, H03M 100

Patent

active

057811415

ABSTRACT:
A digital-to-analog converter includes an R-2R resistive ladder network having resistors connected in a ladder form in correspondence with a number of bits of a digital input signal. The R-2R resistive ladder network has an output terminal. A pair of positive and negative dc-power-supply terminals are connected to the R-2R resistive ladder network. Currents flowing between the R-2R resistive ladder network and one of the positive and negative dc-power-supply terminals are controlled in response to the bits of the digital input signal to generate an analog voltage signal at the output terminal of the R-2R resistive ladder network. The analog voltage signal depends on the digital input signal. A first resistor and a second resistor located outside the R-2R resistive ladder network are connected in series between the positive and negative dc-power-supply terminals. A third resistor located outside the R-2R resistive ladder network is connected between the output terminal of the R-2R resistive ladder network and the second resistor located outside the R-2R resistive ladder network. A conversion output terminal is connected to a junction between the second and third resistors located outside the R-2R resistive ladder network.

REFERENCES:
patent: 4542368 (1985-09-01), Lillis

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