The tester circuit of transistor and common cathode digital pipe

Published:2011/6/6 23:40:00 Author:qqtang | Keyword: tester circuit, transistor, common cathode | From:SeekIC

See as the figure, the positive power supply Vcc and the ground terminal GND are connected with the circuit under test by a clamp, the UIN pole is linked to the tested point by a probe.when the tested point is in a high LEV, VT1 is conducting, the h,c and g are in high LEV and glowing, and the e and f are glowing by separating pipe VD1 at the same time, the digital pipe indicates a H ; when the tested point is in a LEV, VT2 is conducting,and d,e and f are glowing, a 1 is shown. VD1 and VD2 fulfill the separating functions, and complete the functions of logic OR (which can be substituted by a second input terminal).



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Measuring_and_Test_Circuit/The_tester_circuit_of_transistor_and_common_cathode_digital_pipe.html

Print this Page | Comments | Reading(3)