Ivy Biomedical Systems 101R User Manual

THEORY OF OPERATION
Digital Circuitry
The digital circuitry consists of the microprocessor and its associated components. The 8 MHz clock is generated by
the F1100.. The microprocessor is U48. U49 is the read only memory (ROM), which contains the program to
operate the system. U32 is an input/output (I/O) port for passing information to and from the microprocessor
circuits. U52 is random access memory (RAM). This memory is for temporary storage of data that the
microprocessor must store. U36 generate timing signals for the system.
For the stroke display, the microprocessor sends the digital ECG waveform through FIFOs U27 and U28 to D/A
converter U29 to generate the D/A signal that gets switched into the vertical deflection signal during ECG
waveform display.
For raster display, the microprocessor sends the data through U36 and U15 to generate the Z signal. This signal
brightens the crt at the proper times to generate the characters.
34 Model 101R/NR Service Manual

Ivy Biomedical Systems 101R Specifications

General

Brand	Ivy Biomedical Systems
Model	101R
Category	Monitor
Language	English