Segmented DAC using PMOS and NMOS switches for improved span

Details Segmented DAC using PMOS and NMOS switches for improved span Segmented DAC using PMOS and NMOS switches for improved span

1998-04-20

1999-12-07

Williams, Howard L.

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

341154, H03M 168

Patent

active

059991151

ABSTRACT:
A digital-to-analog converter with cascaded coarse and fine resistor divider strings. The fine resistor string contains 2.sup.N or more resistor segments controlled by N number of fine divider control bits. Resistors located at each end of the fine divider string are a fraction of the nominal value for the remaining fine divider resistor segments. The on-resistance of switches coupling the coarse and fine resistor divider strings is less than or equal to a predetermined fraction of the nominal value for the fine divider resistor segments to minimize contributions to linearity error. The DAC uses all CMOS devices including NMOS and PMOS switches which utilize approximately the full rail-to-rail voltage of the voltage source without the use of additional amplifiers. The DAC provides linearity of about one-fourth LSB.

REFERENCES:
patent: 4338591 (1982-07-01), Tuthill
patent: 4638303 (1987-01-01), Masuda et al.
patent: 4918448 (1990-04-01), Hauviler et al.
patent: 5111205 (1992-05-01), Morlon
patent: 5214668 (1993-05-01), Satou et al.
patent: 5495245 (1996-02-01), Ashe
patent: 5703588 (1997-12-01), Rivoir et al.
Burton et al., Microprocessor Systems Handbook, copyright 1977 Analog Devices Inc. pp. 148 and 149 LOC catalog card #77-88133.
Post et al., "A 14 Bit Monotonic NMOS D/A Converter," IEEE Journal of Solid-State Circuits, vol. SC-18, No. 3, Jun. 1983.
Cummins et al., "An IEEE1451 Standard Tranducer Interface Chip," 1998 IEEE International Solid-State Circuits Conference, ISSCC98, Session 17, Sensor Technology, Paper SA 17.3.

Affiliated with

Also associated with

Rating

Segmented DAC using PMOS and NMOS switches for improved span does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Segmented DAC using PMOS and NMOS switches for improved span, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Segmented DAC using PMOS and NMOS switches for improved span will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-829155