An Interference-Robust Reconfigurable Receiver With Automatic Frequency-Calibrated LNA in 65-nm CMOS

2017 ◽  
Vol 25 (11) ◽  
pp. 3113-3124 ◽  
Author(s):  
Xinwang Zhang ◽  
Zipeng Chen ◽  
Yanqiang Gao ◽  
Feng Ma ◽  
Jiachen Hao ◽  
...  
Keyword(s):  
Automatic Frequency

scholarly journals A tunable Gm-C polyphase filter with high linearity and automatic frequency calibration

2014 ◽  
Vol 11 (18) ◽  
pp. 20140794-20140794 ◽  
Author(s):  
Mingjie Zhou ◽  
Jianhui Wu ◽  
Chao Chen ◽  
Zhikang Cai
Keyword(s):  
Automatic Frequency ◽  
Polyphase Filter ◽  
High Linearity ◽  
Frequency Calibration

Automatic Frequency-Tracking Control for Ultrasound Welding System

2011 ◽  
Vol 204-210 ◽  
pp. 2041-2044
Author(s):  
Kao Feng Yarn ◽  
King Kung Wu ◽  
Kai Hsing Ma ◽  
Wen Chung Chang
Keyword(s):  
High Power ◽  
Tracking Control ◽  
Control Method ◽  
Ultrasonic Welding ◽  
Automatic Frequency ◽  
Frequency Tracking ◽  
Power Ultrasonic ◽  
Fpga Chip ◽  
Working Frequency ◽  
Welding System

A new frequency-tracking control method to catch the optimal working frequency for the high power ultrasonic welding system is proposed. In a high power ultrasonic resonant system, the induced high temperature will change the working frequency. Therefore, the proposed control method to track the optimal working frequency becomes very attractive and important. This control method is practically implemented by a FPGA chip which basically includes two logic circuits. One logic circuit is to find the optimal working frequency automatically and the other one is to adjust the working frequency by detecting the working current simultaneously. Experimental results exhibit the new method can effectively control and track frequency for high power ultrasonic welding system.

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