The Realization of the 1/2 Blanking in the 4-1/2 Digital Voltmeter Based on ICL7135 Chip

Abstract:

It is necessary to realize the 1/2 blanking when designing the 4-1/2 digital voltmeter based on ICL7135 chip. The traditional digital voltmeter meters achieve the function by using the single-chip microcomputer program control. A new design should be considered when circuits are designed without the single-chip microcomputer. This paper combines the blanking terminal of the CD4511 decoding chip with the output signal of the A/D chip to design a complex logic gate circuit for realizing the blanking function. Experiment has been done to verify that the design of the complex logic gate circuit is feasible and it can guarantee the realization of the 1/2 blanking.

• Periodical: Applied Mechanics and Materials (Volume 614)
• Pages: 249-253
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.614.249
• Online since: September 2014
• Authors: Guang Yuan Zhu, Wei Wei Hu*, Yu Feng Sun
• Keywords: Blanking Circuit Design, Complex Logic Gate Circuit Component, Digital Voltmeter, ICL7135 Chip

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