A 1024-QAM Capable WLAN Receiver with -56.3dB Image Rejection Ratio Using Self-Calibration Technique

2018 ◽  
Vol E101.C (7) ◽  
pp. 457-463 ◽  
Author(s):  
Shusuke KAWAI ◽  
Toshiyuki YAMAGISHI ◽  
Yosuke HAGIWARA ◽  
Shigehito SAIGUSA ◽  
Ichiro SETO ◽  
...  
Keyword(s):  
Image Rejection ◽  
Calibration Technique ◽  
Rejection Ratio ◽  
Self Calibration ◽  
Image Rejection Ratio

Pass-Band Gain Improvement Technique for Passive RC Polyphase Filter in Bluetooth Low-IF Receiver Using Two RC Band-Stop Filters

2020 ◽  
Vol 38 ◽  
pp. 192-205
Author(s):  
Minh Tri Tran ◽  
Nene Kushita ◽  
Anna Kuwana ◽  
Haruo Kobayashi
Keyword(s):  
Superposition Principle ◽  
Local Maximum ◽  
Pass Band ◽  
Image Rejection ◽  
Polyphase Filter ◽  
Rejection Ratio ◽  
Input Signals ◽  
Low If Receiver ◽  
Image Rejection Ratio ◽  
Positive Frequency

This paper proposes a method to design a flat pass-band gain with two RC band-stop filters for a 4-stage passive RC polyphase filter in a Bluetooth receiver. Based on the superposition principle, the transfer function of the poplyphase filter is derived. However, the pass-band gain of this filter is not flat on the positive frequency domain. There are two local maximum values when the input signals are the wanted signals. Therefore, two RC band-stop filters are used to improve the pass-band gain of these local maximum values. As a result, a flat pass-band gain passive RC poly-phase filter is designed for a Bluetooth low-IF receiver which image rejection ratio is-36dB, and ripple gain is 0.47dB.

460 μW 32 dB image rejection ratio second‐order active‐RC complex filter with improved power efficient opamp

2013 ◽  
Vol 49 (1) ◽  
pp. 18-20 ◽  
Author(s):  
J. Wang ◽  
L. Ye ◽  
L. Chen ◽  
J. Liu ◽  
H. Liao
Keyword(s):  
Second Order ◽  
Image Rejection ◽  
Power Efficient ◽  
Complex Filter ◽  
Rejection Ratio ◽  
Image Rejection Ratio

On-die self-healing of mixer image-rejection ratio for mixed-signal electronic systems

2012 ◽  
Author(s):  
Subramaniam Shankar ◽  
Prabir Saha ◽  
Duane C. Howard ◽  
Ryan Diestelhorst ◽  
Troy D. England ◽  
...  
Keyword(s):  
Electronic Systems ◽  
Self Healing ◽  
Image Rejection ◽  
Mixed Signal ◽  
Rejection Ratio ◽  
Image Rejection Ratio
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