Digital to analog converter circuit

Details Digital to analog converter circuit Digital to analog converter circuit

1983-01-03

1985-05-14

Miller, Charles D.

Communications: electrical

Audible indication

Percussion-type sound producer

H03K 1302

Patent

active

045175519

ABSTRACT:
A digital to analog converter which provides positive and negative analog output signals in response to a digital input number is disclosed. The input number has n bits including a sign bit and n-1 magnitude bits, where n is an integer. An input receives the n-1 magnitude bits and is coupled to switches for selectively coupling a predetermined reference voltage to a capacitance portion comprising a rank ordered plurality of capacitors. First and second charges related to first and second portions of said n-1 magnitude bits, respectively, are sequentially integrated with respect to time by an integrator which is selectively coupled to the capacitance portion to provide an analog output signal. A buffer output amplifier selectively samples and holds the analog output signal.

REFERENCES:
patent: 2889549 (1959-06-01), Caughey
patent: 3056085 (1962-09-01), James
patent: 4077035 (1978-02-01), Yee
patent: 4126852 (1978-11-01), Baertsch

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