Digital Interface to Analog Circuits is an example of Mixed Signal Design. Generating Digital Control Signals from the Analog sections in instruments is also done by Mixed Signal Circuit.
A/D Convertors and D/A Convertors are like Mixed Signal Chips. A Digital Potentiometer that controls an analog signal amplitude with a digital byte or word, figures in Mixed Design Circuit.
350 MHz Mixed Signal Oscilloscope HMO3524 by HAMEG Instruments
Analog Designs have to handle Linear Signals, Like 2.03 V and 35.3812 mA. Waveforms of all shapes from Straight Line DC Levels to the Jittery and Multi-Frequency Audio Waveforms.
Mixed Circuits Analog with Digital
Mixed Signal IC or ASIC are chips that are mainly Digital on the Core but have peripheral I/O within the chip to interface with the real world outside, over Analog Signals. Sensors and Actuators use signals in the analog language. The CPU with its Math Power, speaks Digital Words, its behavior thus can be patterned by a Software Program.
Fluid or Water Level with Reed Relays
Some Circuits on above pages are..
- Voltage to pulse converter using opamps
- Analog Section of 8751 based flowmeter
- Voltage to pulse converter impulse counter
- 16 channel analog multiplexer
- 8 channel analog mux with sample hold
- Digital Control for 8 channel analog mux