Title :
A system-oriented 5 V NMOS LSI circuit for data acquisition and front-end digital control
Author :
Sibbert, Hans ; Hoefflinger, Bernd ; Zimmer, Gunter ; Cioaca, Dumitru ; Dahms, Jürgen ; Pfeffer, Josef
fDate :
6/1/1979 12:00:00 AM
Abstract :
A 5 V n-channel enhancement/depletion circuit performs 8 bit data acquisition with a 5 V analog input range. It provides front-end digital control with adjustable set point and hysteresis. A simple constant-slope converter was developed, which is calibrated for a given application by tuning the built-in clock oscillator and adjusting the only reference, analog ground. For temperature compensation, the oscillator and the current source track with temperature. Digital subtraction was implemented with a three-decade synchronous BCD up/down counter, which produces positive or negative readings by a reversal of the counter. The circuit has a multiplexed three-digit TTL compatible BCD output. The chip size is 13 mm/SUP 2/ and it consumes 150 mW.
Keywords :
Convertors; Data acquisition; Digital control; Digital integrated circuits; Field effect integrated circuits; Large scale integration; convertors; data acquisition; digital control; digital integrated circuits; field effect integrated circuits; large scale integration; Circuit optimization; Counting circuits; Data acquisition; Digital control; Digital-controlled oscillators; Hysteresis; Land surface temperature; Large scale integration; MOS devices; Tuning;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.1979.1051216
