Current cell for converting a binary value to an analog value

Details Current cell for converting a binary value to an analog value Current cell for converting a binary value to an analog value

1994-11-03

1996-07-30

Young, Brian K.

Coded data generation or conversion

Converter compensation

341144, H03M 166

Patent

active

055415989

ABSTRACT:
A digital value represented by binary signals is converted to a corresponding analog value by three (3) current cells, preferably C-MOS p-type, in a digital-to-analog converter (DAC). The three (3) transistors, preferably disposed on an integrated circuit chip, comprise (a) an input switch transistor receiving a digital input signal at its gate, (b) an output transistor providing an output current at its drain and (c) a current bias transistor. The switch and output transistor sources and the bias transistor drain are common. The output transistor gate is biased by a substantially constant voltage. The bias transistor source receives a supply voltage through a bonding pad on an integrated circuit chip and a bond wire extending from the pad to a pin on the chip package lead frame. At low frequencies (e.g. 100 MHz), the wave shape of the output transistor drain current is flat. At increased frequencies (e.g. 225 MHz), the output current has a spike from a supply voltage spike induced in the bond wire as a result of different magnitudes in the bias transistor current when the switch transistor responds to binary signals.

REFERENCES:
patent: 4088905 (1978-05-01), Comer
patent: 4381497 (1983-04-01), Lillis
patent: 4831282 (1989-05-01), Colles

Affiliated with

Also associated with

Rating

Current cell for converting a binary value to an analog value does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Current cell for converting a binary value to an analog value, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Current cell for converting a binary value to an analog value will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1662677