Binary scaled current array source for digital to analog convert

Details Binary scaled current array source for digital to analog convert Binary scaled current array source for digital to analog convert

1984-05-18

1986-05-06

Beha, Jr., William H.

Electricity: power supply or regulation systems

Self-regulating

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

323317, 340347DA, 340347CC, G05F 316

Patent

active

045874778

ABSTRACT:
A binary scaled current source in which a set of binary switches M.sub.1, . . . , M.sub.n controllably switch a current I to a selected one of a set of n outputs. Each switch M.sub.k is controlled by an associated control signal B.sub.k having a duty cycle of 2.sup.k-n-1. At any given time one and only one of the control signals is high so that the current I is diverted to the kth output a fraction 2.sup.k-n-1 of the time. In two particular schemes referred to as the weighted pulse width (WPW) and the weighted repetition rate (WRR) schemes, all of the control signals are periodic with a group pattern repetition period T. In the WPW scheme, B.sub.k has in each period T a single pulse of duration 2.sup.k-n-1 *T. In the WRR scheme, B.sub.k has in each period T2.sup.k-1 pulses each of duration 2.sup.-n *T. The output of each binary switch is typically passed through a low pass filter which conducts substantially only the dc component of the output current from the binary switch to which it is connected. These dc components serve as a set of binary scaled dc currents. Pulsing switches are also added between the source of current I and the binary switches to provide the current I in pulses that do not overlap any of the transitions in the control signals so that the binary scaled currents that are produced are insensitive to timing of the transitions in the control signals.

REFERENCES:
patent: Re29619 (1978-04-01), Pastoriza
patent: 2907021 (1959-09-01), Woods
patent: 3831167 (1974-08-01), Tewksbury
patent: 3982172 (1976-09-01), van de Plessche
patent: 4225816 (1980-09-01), Schade
patent: 4458201 (1984-07-01), Koen

Affiliated with

Also associated with

Rating

Binary scaled current array source for digital to analog convert does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Binary scaled current array source for digital to analog convert, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Binary scaled current array source for digital to analog convert will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1576938