Filters








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A CMOS continuous-time active biquad filter for gigahertz-band applications

Y. Chang, J. Choma, J. Wills
ISCAS'99. Proceedings of the 1999 IEEE International Symposium on Circuits and Systems VLSI (Cat. No.99CH36349)  
A general high-Q biquad lter architecture capable of operating in the GHz range is proposed and analyzed.  ...  This lter, which is usable in bandpass and lowpass applications, utilizes two e ective Q-enhancement techniques to circumvent the low-Q characteristics inherent in the circuit.  ...  In communication applications, gigahertz-band lters with high quality factor Q are demanded, but are di cult to produce in standard digital CMOS process.  ... 
doi:10.1109/iscas.1999.780850 dblp:conf/iscas/ChangCW99 fatcat:56idmhnbpjfwxblz2jzydtbari

Design techniques for VHF/UHF high-Q tunable bandpass filters using simple CMOS inverter-based transresistance amplifiers

Ping-Hsing Lu, Chung-Yu Wu, Ming-Kai Tsai
1996 IEEE Journal of Solid-State Circuits  
In this paper, CMOS inverter-based wideband transresistance R, amplifiers are proposed and analyzed. Using the R, amplifiers, tunable VHFKJHF R,-C bandpass biquadratic filters can be designed.  ...  Experimental results have shown that the center frequency f, of the single-ended-output R,-C bandpass biquad is 386 MHz (258 MHz) and Q = 1.195 (Q = 1.012) for k2.5 V (k1.5 V) supply voltage.  ...  ACKNOWLEDGMENT The authors would like to thank A. Shoval of the University of Toronto, Canada, for valuable discussions.  ... 
doi:10.1109/4.509855 fatcat:bdecefk4jnbu3jqb3iqagd3qqy

ON DESIGN OF SELF-TUNING ACTIVE FILTERS

Darko Mitić, Goran Jovanović, Mile Stojčev, Dragan Antić
2020 Facta Universitatis Series Automatic Control and Robotics  
This approach allows us to implement active filters with capacitance values of order of pF, making the complete filter circuit to be amenable for realization in CMOS technology.  ...  In this paper, we present one approach in design of self-tuning all-pass, band-pass, low-pass and notch filters based on phase control loops with voltage-controlled active components and analyze their  ...  Applications of these filters involve frequency of operation from a few tens of hertz up to gigahertz [1] .  ... 
doi:10.22190/fuacr2001059m fatcat:tjuqg5r2cbhfjdbkjfbyhighu4

CMOS transconductance amplifiers, architectures and active filters: a tutorial

E. Sánchez-Sinencio, J. Silva-Martínez
2000 IEE Proceedings - Circuits Devices and Systems  
An updated version of a 1985 tutorial paper on active filters using operational transconductance amplifiers (OTAs) is presented.  ...  The integrated circuit issues involved in active filters (using CMOS transconductance amplifiers) and the progress in ths field in the last 15 years is addressed.  ...  For narrow-band filter applications the filter bandwidth must also be tuned.  ... 
doi:10.1049/ip-cds:20000055 fatcat:fxwcphjmmraatihmag6aogx5ce

A CMOS transconductance-C filter technique for very high frequencies

B. Nauta
1992 IEEE Journal of Solid-State Circuits  
First a differential transconductance element based on CMOS inverters is described. With this circuit a linear, tunable integrator for very-high-frequency integrated filters can be made.  ...  Experimental results of a VHF CMOS transconductance-C low-pass filter realized in a 3-pm CMOS process are given. Both the cutoff frequency and the quality factors can be tuned.  ...  A 100-MHz CMOS continuous-time low-pass filter realized in a 3-pm process has been presented. The filter is constructed with transconductance elements and capacitors.  ... 
doi:10.1109/4.127337 fatcat:sgivhwtip5ca5bx76lioi6dcyy

Software-Defined Radio Front Ends [chapter]

Jan Craninckx
2010 Multi-Mode/Multi-Band RF Transceivers for Wireless Communications  
of a few gigahertz requires fast transistors.  ...  For proper interfacing with the down-conversion mixer, the biquads can also be placed in a current-input mode. Figure 1 .13 summarizes the measurements of a stand-alone flexible lowpass filter.  ... 
doi:10.1002/9780470634455.ch1 fatcat:aqp226s3jbghfdlmjc564ymopy

A Frequency-Translating Hybrid Architecture for Wide-Band Analog-to-Digital Converters

Shahrzad Jalali Mazlouman, Shahriar Mirabbasi
2007 IEEE transactions on circuits and systems - 2, Analog and digital signal processing  
mixer and a 5 th -order, 1 GHz, Butterworth G m -C filter, is implemented in a 90 nm CMOS technology.  ...  The mixer-filter has a THD ≤ 5% (26 dB) over its full 1 GHz bandwidth and provides a signal with a voltage swing of 350 mV pp for the subsequent ADC stage. iv  ...  In terms of circuit design, several techniques can also be used to implement an active continuous-time filter.  ... 
doi:10.1109/tcsii.2007.893734 fatcat:sccrqdqpcjgsroyeelwtvpbpny

Two-step channel selection-a novel technique for reconfigurable multistandard transceiver front-ends

Pui-In Mak, Seng-Pan U, R.P. Martins
2005 IEEE Transactions on Circuits and Systems I Fundamental Theory and Applications  
SPECTRE simulation results validate the reconfigurable functionalities mainly implemented by a triple-mode channel-select filter and a multifunctional sampling-mixer scheme.  ...  First, many design specifications (such as phase noise and settling time) of the RF frequency synthesizer and local oscillator can be substantially relaxed.  ...  the conventional continuous-time mixing approach.  ... 
doi:10.1109/tcsi.2005.851722 fatcat:kws2kl2y6jgn3l5gvwpn2ugxvi

High-Q HF microelectromechanical filters

F.D. Bannon, J.R. Clark, C.T.-C. Nguyen
2000 IEEE Journal of Solid-State Circuits  
IC-compatible microelectromechanical intermediate frequency filters using integrated resonators with 's in the thousands to achieve filter 's in the hundreds have been demonstrated using a polysilicon  ...  These filters are composed of two clamped-clamped beam micromechanical resonators coupled by a soft flexural-mode mechanical spring.  ...  ACKNOWLEDGMENT The authors would like to thank the staff of the University of Michigan's Solid-State Laboratory for fabrication support.  ... 
doi:10.1109/4.839911 fatcat:uh2ol6wxunbyja3zflh2iegbim

A Built in Self Test System for Dynamic Performance Parameter Evaluation of Pipelined Analog to Digital Converter

Alok Barua, Dhanunjay Nalla
unpublished
The system is designed in 180nm CMOS technology with 1P4M TSMC process.  ...  A square wave with variable frequency is applied to the second order low pass filter through a wave shaping circuit which makes the square wave into a harmonic free digital sine wave.  ...  BASIC BUILT IN SELF TEST STRUCTURE Analog test stimulus generation for BIST applications continue to be a hot topic in the test research community, and a number of different strategies for analog signal  ... 
fatcat:jevnpsgc75hdlchppzuqdvvaaq