User`s guide

17
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26 Analyzin
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Waveforms in Probe
About the Oscillator Circuit
The circuit you will simulate and analyze is a mixed analog/
digital oscillator using Schmitt trigger inverters, an open-
collector output inverter, a standard inverter, a JK flip-flop, a
resistor, and a capacitor. The schematic is shown in Figure 17-8.
The circuit uses a one-bit digital stimulus device, DSTIM1. The
device is connected to the rest of the circuit by a single pin and
creates a reset pulse, which resets the flip-flop.
Settin
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Up the Schematic
You must set up and simulate the oscillator circuit using
Schematics.
To open the schematic file
1
Start Schematics. If Schematics is already running, be sure
you are in the schematic editor.
2
From the File menu, select Open and open the following file
in your MicroSim program installation directory:
Examples\Mixsim\Osc\Osc.sch
To clear markers
1
From the Markers menu, select Clear All.
Fi
g
ure 17-8
Mixed Analog/Digital Oscillator Schematic