A low-distortion BiCMOS seventh-order Bessel filter operating at 2.5 V supply

Yang, Fan; Enz, Christian

doi:10.1109/4.494194

Cited by 63 publications

(3 citation statements)

References 18 publications

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“…Then the transfer function of the main output (i.e., ) is simplified to (10) From this equation, dc gain of from the input charge, , is . Then, by using ( 6), the overall dc gain of this filter from the input voltage to its output is (11) In this equation, is the time period of the cycle, i.e., the 8 phases. Also, is an equivalent dc resistance of the sampling capacitor.…”

Section: Transfer Functionmentioning

confidence: 99%

“…I NTEGRATED low-pass filters (LPFs) are key building blocks in various types of applications, such as wireless communications [1]- [7], hard-disk drive read channel [8], [9], video signal processing [10], smoothing filtering in a DAC [11], and anti-aliasing filtering before a sampling system. Noise of these filters is one of the key system-level concerns.…”

Section: Introductionmentioning

confidence: 99%

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Analysis and Design of a High-Order Discrete-Time Passive IIR Low-Pass Filter

Tohidian

Madadi

Staszewski

2014

IEEE J. Solid-State Circuits

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In this paper, we propose a discrete-time IIR low-pass filter that achieves a high-order of filtering through a charge-sharing rotation. Its sampling rate is then multiplied through pipelining. The first stage of the filter can operate in either a voltage-sampling or charge-sampling mode. It uses switches, capacitors and a simple gm-cell, rather than opamps, thus being compatible with digital nanoscale technology. In the voltage-sampling mode, the gm-cell is bypassed so the filter is fully passive. A 7th-order filter prototype operating at 800 MS/s sampling rate is implemented in TSMC 65 nm CMOS. Bandwidth of this filter is programmable between 400 kHz to 30 MHz with 100 dB maximum stop-band rejection. Its IIP3 is +21 dBm and the averaged spot noise is 4.57 nV/ Hz. It consumes 2 mW at 1.2 V and occupies 0.42 mm 2 .

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Section: Transfer Functionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis and Design of a High-Order Discrete-Time Passive IIR Low-Pass Filter

Tohidian

Madadi

Staszewski

2014

IEEE J. Solid-State Circuits

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“…A fully differential tuning circuit is used to generate the control voltages V C? and V C- [28][29][30][31][32][33][34][35][36][37][38][39][40]. The tuning circuit is…”

Section: Introductionmentioning

confidence: 99%

Tunable frequency versatile filters implementation using minimum number of passive elements

Jiang

2008

Analog Integr Circ Sig Process

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Two new universal active current-mode filters are proposed, one topology of which is with three inputs and one output, the other prototype is with single input and three outputs counterpart. One proposed circuit employs two current conveyors, two grounded capacitors and two resistors, wherever the other proposed circuit employs two current conveyors, two grounded capacitors and two multiinput, multi-output Operational Transconductance Amplifiers(OTA) as variable resistor for tuning the cutoff frequency of realized filters. Without changing the passive elements, the proposed circuits employ features of multifunctional, convenient for integration, low sensitivities and simple in structure.

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A mathematical method to realize complex poles in a high‐order passive switched‐capacitor filter

Niaboli-Guilani

Ardeshir

2019

Circuit Theory & Apps

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Summary A high‐order discrete‐time IIR low‐pass with complex poles using charge sampling is presented in a single‐stage structure by using a mathematical strategy. In comparison with the analog complex‐poles Gm‐C filters, the proposed filter consumes lower power and has good linearity, and all of the tunings are implemented only by capacitor sizes. The proposed filter is a seventh‐order Butterworth, but this method can be generalized to implement other complex pole filters like Tchebyshev and Elliptic. Post‐layout simulation results in 130‐nm complementary metal‐oxide‐semiconductor (CMOS) show an IIP3 of +18 dBm and a noise figure of 5 dB. The filter has a rejection of more than 110 dB in its stop band and consumes 1.5 mW with a 1.6‐V supply voltage, and circuit occupies an about 0.12 mm2 of silicon.

show abstract

A low-distortion BiCMOS seventh-order Bessel filter operating at 2.5 V supply

Cited by 63 publications

References 18 publications

Analysis and Design of a High-Order Discrete-Time Passive IIR Low-Pass Filter

Analysis and Design of a High-Order Discrete-Time Passive IIR Low-Pass Filter

Tunable frequency versatile filters implementation using minimum number of passive elements

A mathematical method to realize complex poles in a high‐order passive switched‐capacitor filter

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