Symmetrical passive RC notch filter with two cutoff frequencies for ripple reduction in chopper offset-stabilized amplifiers

2014 ◽  
Author(s):  
Cornel Stanescu ◽  
Cristian Dinca ◽  
Radu Iacob
Keyword(s):  
Notch Filter ◽  
Cutoff Frequencies ◽  
Ripple Reduction

Design Proposal for Inductor Type Buck Converter in Bluetooth Receiver Chip with Overshoot Cancellation and Ripple Reduction Technique

2020 ◽  
Vol 38 ◽  
pp. 179-191
Author(s):  
Minh Tri Tran ◽  
Yi Fei Sun ◽  
Yasunori Kobori ◽  
Anna Kuwana ◽  
Haruo Kobayashi
Keyword(s):  
Supply Voltage ◽  
Superposition Principle ◽  
Notch Filter ◽  
Cmos Technology ◽  
Buck Converter ◽  
Ripple Reduction ◽  
Step Down ◽  
Low If Receiver ◽  
Design Proposal ◽  
Blue Tooth

This paper presents a novel circuit design technique for an inductor type step-down buck converter in a blue-tooth receiver. Based on the superposition principle, a model of this system is proposed and verified by simulation. The overshoot phenomena is well controlled when R, L and C components are chosen by a relation |ZL|=|ZC|=2R based on a balanced charge and discharge time condition T=2π√LC=4πRC. Furthermore, a fundamental harmonic notch filter is recommended to keep small ripple which is designed at the fundamental harmonic frequency of PWM signal. A battery supply voltage of 3.6V was applied to the converter and the output voltage was set to 1.8V. The design of this methodology is given through the CMOS technology. As a result, a 1.8V stable step-down buck converter is designed for a blue-tooth low-IF receiver which the ripple is smaller than 0.2mVpp.

A Noise Free Adaptive Transversal Notch Filter Using SSCF Algorithm with Decorrelation Parameter

2013 ◽  
Vol 133 (12) ◽  
pp. 2236-2242 ◽  
Author(s):  
Masaki Kobayashi ◽  
Yasunori Nagasaka ◽  
Yoshio Itoh
Keyword(s):  
Notch Filter
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