Transcript Rahul Sarpeshkar

TIME-BASED HYBRID ANALOGDIGITAL COMPUTATION
Rahul Sarpeshkar
Assistant Professor
MIT
Electrical Engineering and Computer Science
Media Lab
6/28/02
THE HYBRID STATE MACHINE (HSM)
FINITE STATE MACHINE
HYBRID STATE MACHINE (HSM)
“Spike” = Pulse or Digital Event
An HSM for Successive Approximation A/D Conversion
.
Analog Memory Element
8 bit-precise storage characteristic
Stored Voltage (V)
Output Voltage (V)
8 bit-precise write characteristic
Input Voltage (V)
13mV drift
Time (s)
Uses a clock to do signal restoration without explicit quantization on voltage
Information that has been first converted to time.
When time is a signal variable, a clock is a powerful tool for quantization
since you round up or round down to the nearest clock edge.