A 19.7 MHz, 5th Order Active-RC Chebyshev LPF for IEEE802.11n with Automatic Quality Factor Tuning Scheme

Kousai, Shouhei; Hamada, Mototsugu; Ito, Ryoko; Itakura, Tetsuro

doi:10.1109/asscc.2006.357893

Cited by 23 publications

(37 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The FOM of the filters presented here is better than those that have a comparably narrow transition band. 1 At an input signal level equal to the IIP3, the IM3 (extrapolated from smallsignal levels) is also equal to the IIP3. Since the third-order distortion increases at 3 dB for a 1-dB increase in the input signal, it can be worked out that the SNR is equal to 2/3(IIP3 − N ) when the distortion is equal to noise (both the IIP3 and N are in decibels).…”

Section: Measured Resultsmentioning

confidence: 99%

“…The power dissipation is usually independent of the signal level. A figure of merit (FOM) inspired by the above relationship is the ratio of the power dissipated to the product of order n, bandwidth f B , and the SNR at an input amplitude for which IM3 is equal to the noise level, 1 and it is given by …”

Section: Measured Resultsmentioning

confidence: 99%

“…I N zero-intermediate-frequency integrated-circuit radio receivers, low-pass filters [1]- [3] are used before analog/ digital conversion. Their bandwidths range from a few megahertz to a few tens of megahertz.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A High-IIP3 Third-Order Elliptic Filter With Current-Efficient Feedforward-Compensated Opamps

Krishnapura

Agrawal

Singh

2011

IEEE Trans. Circuits Syst. II

View full text Add to dashboard Cite

Abstract-A low-distortion active filter is realized using currentefficient feedforward-compensated operational amplifiers in the integrators and feedforward current injection in the summing amplifier. A third-order elliptic low-pass filter with two possible bandwidth settings of 17 and 8.5 MHz consumes 1.8 mW from a 1.8-V supply and occupies 0.17 mm 2 in a 0.18-μm CMOS process. The measured maximum signal-to-noise and distortion ratios at the two bandwidth settings are 50.5 and 52.5 dB, respectively. The corresponding third-order intermodulation intercept points (IIP3) are +28.2 and +30.8 dBm. Automatic tuning is used at the startup to counter process variations and set the bandwidth accurately.

show abstract

Section: Measured Resultsmentioning

confidence: 99%

Section: Measured Resultsmentioning

confidence: 99%

See 1 more Smart Citation

A High-IIP3 Third-Order Elliptic Filter With Current-Efficient Feedforward-Compensated Opamps

Krishnapura

Agrawal

Singh

2011

IEEE Trans. Circuits Syst. II

View full text Add to dashboard Cite

show abstract

“…The choice of them depends on the filter selectivity/order, design/circuit complexity, and power/chip size. In the literature, Butterworth [2, 5-7, 17, 20, 23, 25, 28, 38, 41], Chebyshev [3,4,19,25,26,32,33,36], and elliptic [4,22,24,25,27,36,37,40] approximations all have been popularly used for baseband channel filters with the Butterworth type used more often due to the ease of design and simplicity in structure. Reference [3] also designs an inverse Chebyshev filter.…”

Section: Structures For High-order Analogue Baseband Filtersmentioning

confidence: 99%

Multistandard Analogue Baseband Filters for Software-Defined and Cognitive Radio Receivers

Sun

Moritz

Zhu

2011

Circuits Syst Signal Process

View full text Add to dashboard Cite

Analogue baseband filters are an important circuit for channel select and anti-aliasing in wireless and mobile communication systems. For software and cognitive radio, they must be widely tunable and reconfigurable to accommodate existing, emerging, and future wireless and mobile standards. In this paper, design considerations of tunable and programmable filters for highly integrated multistandard receivers are presented. General background of multistandard integrated receivers and design challenges of analogue baseband filters are given. Circuit techniques for baseband filter design including the widely used active-RC and Gm-C circuits are described. Filter structures and design methods for high-order baseband filters are reviewed. On-chip tuning issues and methods are discussed. Results and performances of some published design examples are summarized. Future directions are also pointed out.

show abstract

“…While high bandwidth MOSFET-RC filters usually dissipate more power than other filter types, precise Q tuning methods can reduce the total power consumption by optimizing the operational amplifier biasing currents [10,11]. Nonetheless, one of the major drawbacks of continuous MOSFET-RC tuning is the linearity degradation due to the non-linear transistor behavior.…”

Section: Introductionmentioning

confidence: 99%

A Method for Continuous Tuning of MOSFET–RC Filters with Extended Control Range

Kiela

Navickas

2016

Journal of Electrical Engineering

View full text Add to dashboard Cite

In this paper a tuning structure for a MOSFET?RC filters is presented. The proposed tuning structure is composed of switched resistor banks with voltage controlled transistors. The voltage controlled transistors use active feedback with extended control range for continuous filter parameter tuning, without degrading the total linearity performance of the filter.The proposed tuning structure is tested by implementing it in a second order low pass biquadratic filter cell in 65 nm CMOS technology. The designed filter has a highly reconfigurable response, ranging from Chebyshev to Bessel, a tuneable -3 dB bandwidth from 10 MHz to 100 MHz and can be used for multiple standard wireless solutions. Filter IIP3 performance is not degraded when the bandwidth is continuously tuned by 40 % with a 1 V pp input. The maximum power dissipation, including active feedback circuits, is 17.2 mW from a 1.2 V source when the filter is tuned to 100 MHz bandwidth.

show abstract

A 19.7 MHz, 5th Order Active-RC Chebyshev LPF for IEEE802.11n with Automatic Quality Factor Tuning Scheme

Cited by 23 publications

References 3 publications

A High-IIP3 Third-Order Elliptic Filter With Current-Efficient Feedforward-Compensated Opamps

A High-IIP3 Third-Order Elliptic Filter With Current-Efficient Feedforward-Compensated Opamps

Multistandard Analogue Baseband Filters for Software-Defined and Cognitive Radio Receivers

A Method for Continuous Tuning of MOSFET–RC Filters with Extended Control Range

Contact Info

Product

Resources

About