Simple digital frequency meter solutions. (B in 1997) Author and speaker: tian liang (radio department of southeast university, 12 March 2003) A) task Design and make a simple frequency meter for display. (ii) requirements 1. Basic requirements (1) frequency measurement A. Measuring range signal: square wave, sine wave Magnitude: 0.5V ~ 5V [note] Frequency: 1Hz ~ 1MHz B. The test error is less than 0.1% (2) periodic measurement A. Measuring range signal: square wave, sine wave Magnitude: 0.5V ~ 5V [note] Frequency: 1Hz ~ 1MHz B. The test error is less than 0.1% 3) pulse width measurement A. Measuring range signal: pulse wave Magnitude: 0.5V ~ 5V [note] The pulse width is greater than 100 mu s B. The test error is less than 0.1% (4) display decimal number display, display refresh time 1 ~ 10 seconds Continuous adjustable, the above three kinds of measuring functions are used in different colors Led instructions. (5) with the function of self-calibration, the signal frequency is 1MHz. (6) design and make the stable voltage supply that meets the requirements of this design

Packet : 87361024thefrequencymeterdesign.rar filelist
简易数字频率计题解 （ 1997年B 题）.ppt

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