September 2000
Beginner
152 pages
8h 26m
English
Content preview from Mims Circuit Scrapbook V.I.
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Four
Test & Measurement Circuits
1. Experimental Solid-State Oscilloscope
Figure A is the schematic diagram of the experimental scope. In operation, a signal applied to the noninverting input of the 741 op amp is amplified and routed to a flash A/D converter made up of LM339 quad comparators and a 74147 priority encoder. A detailed description of this A/D converter was given in the September and October 1978 Experimenter’s Corner columns.
Fig. A Schematic of a solid-state 10-by-16 LED array oscilloscope.
The digital output of the 74147 is a 4-bit BCD nibble. This nibble, after being decoded by a 74145 1-of-10 decoder, activates one of the ...
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