Milli Volt Source for Printer Port
This circuit uses a R-2R Ladder Resistor Network to convert digital data from PC Printer Port to Analog. This can be used as a Millivolt Source or Programmable Power Supply. This circuit is a...
Category: Mixed-Signal-Design
RTD Pt-100 Four Point Alarm
Here 4052 is used as an analog multiplexer, U3A TL062 opamp is wired as a 1mA Constant Current Source. It pumps 1mA into U2 4052 pin 13 X . Depending on BCD code on...
PLL using 4046 – Phase Locked Loop
CD4046 is a PLL or phase lock loop, it mainly consists of a VCO and phase comparators. This is a component in FM demodulation and modulation. Mixed and Interface Circuits
LM311 Square Triangle Oscillator for PWM
LM311 is a comparator, It operates from single 5V supply or dual supplies,input current 150 nA, 50 V-50 mA output drive capability. TTL-CMOS compatible output. Even LM324 used as a comparator Water Level Indicator with...
Monostable Multivibrator CD4538
CD4538 is a dual Monostable Multivibrator. When you trigger the chip the output sends off one single pulse or one high-low event. Mixed Circuits Analog with Digital The T+ pin 4 of U1a is...
Fixed frequency Variable duty cycle with 555
This circuit is based on a very old application note from exar, in this the frequency is fixed by IC1 and IC2 -P1 controls the duty cycle. you need to compute the R and...
Voltage to Frequency Converter AD Interface
This is the Analog front end of the 80C39 Process Controller. The analog input is protected by a Zener barrier, low leakage. You could use clamping diodes too. The non-inverting low-offset amp offers high input impedance....
Analog Ground and Digital Ground
I need a few tips from you on Analog design in general: I have seen that a lot of ADCs have a separate AGND and DGND, but they are shorted at the chip. I...
