1.15 GHz image rejection filter with 45 dB image rejection ratio and 8.4 mW DC power in 90 nm CMOS

2019 ◽  
Vol 84 ◽  
pp. 48-53 ◽  
Author(s):  
An'an Li ◽  
Yingtao Ding ◽  
Zhiming Chen ◽  
Baoyong Chi
Keyword(s):  
Image Rejection ◽  
Rejection Ratio ◽  
Dc Power ◽  
Rejection Filter ◽  
Image Rejection Ratio ◽  
Image Rejection Filter

Monolithic J-band image-rejection filter

1983 ◽  
Vol 19 (21) ◽  
pp. 902
Author(s):  
S.J. Greenhalgh ◽  
J.B. Swift ◽  
J.R. Cockrill
Keyword(s):  
Image Rejection ◽  
Rejection Filter ◽  
Image Rejection Filter ◽  
Band Image

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.

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