Tektronix 371B, Service Manual

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General Information
2-4
371B Service Manual
Measurement Concepts
The 371B consists of a specially-designed CRT screen and associated electronics
that allow a user to display the characteristics of a semiconductor device. The
display screen is designed to display the operating characteristics of the DUT in
an easy-to-read, standard graph form.
The 371B can be applied to a broad range of semiconductor test application,
such as:
Semiconductor design analysis
Semiconductor failure analysis
Incoming inspection of semiconductors
Comparison of semiconductor device characteristics
Semiconductor manufacturing output
Figure 2–1 helps to illustrate 371B measurement concepts. A collector supply
and step generator circuits apply voltage or current to the DUT. A detector
amplifier measures the resulting effect. Measurement results are displayed on a
CRT as one or more characteristic curves.
Figure 2-1: Basic 371B block diagram
The collector supply provides a swept or pulsed voltage to the DUT. Amplitude
is controlled by the collector supply VARIABLE knob. This signal is applied to
the collector (drain, anode, or equivalent terminal) of the DUT.
Collector Supply