Current-mode continuous-time filters: two design approaches

Ramírez-Angulo, J.; Robinson, M.E.; Sanchez-Sinecio, E.

doi:10.1109/82.145290

Cited by 173 publications

(48 citation statements)

References 9 publications

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“…For the design of current-mode filters in principle two architectures were possible (Ramirez-Angulo et al, 1992). The G m -C approach is discussed in Manhattanakul and Toumazou (1998) in a very detailed way.…”

Section: Filter Designmentioning

confidence: 99%

A 3rd-order current-mode filter in 0.12 μm CMOS

Kolm

Zimmermann

2008

Adv. Radio Sci.

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Abstract. For software radio applications in system-onchips, a 3rd-order current-mode Butterworth filter in 120 nm CMOS is realized. This filter is used for reconstruction purposes between a current-steering DAC and a current-mode mixer. Power can be reduced by using a current-mode architecture. The cut-off frequency of this filter is switchable between 1 MHz and 4 MHz, the current consumption is 4.5 mA at V DD =1.5 V, the inband noise density is 100 pA/ √ H z and it has a dynamic range up to 65 dB.

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Section: Filter Designmentioning

confidence: 99%

A 3rd-order current-mode filter in 0.12 μm CMOS

Kolm

Zimmermann

2008

Adv. Radio Sci.

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“…There are a small number of filter topologies operating in trans-impedance-mode reported in the literature [25][26][27]. These filter topologies reported in [24][25][26] cannot realize all the standard filter functions (LP, BP, HP, Notch and AP). As far as the topic of this paper is concerned, the filter circuits operated in either current-mode or trans-impedance-mode or in both modes simultaneously, using a single active element, are of interest.…”

Section: Introductionmentioning

confidence: 99%

“…Such filters can be used as an interface circuit connecting a current-mode circuit to a voltage-mode circuit and find direct applications with some sensors, the receiver base band (BB) blocks of modern radio systems and D/A converters which provide a current as output signal, avoiding a current to voltage conversion [23,24]. There are a small number of filter topologies operating in trans-impedance-mode reported in the literature [25][26][27]. These filter topologies reported in [24][25][26] cannot realize all the standard filter functions (LP, BP, HP, Notch and AP).…”

Section: Introductionmentioning

confidence: 99%

Single MO-CCCCTA-Based Electronically Tunable Current/Trans-Impedance-Mode Biquad Universal Filter

Singh¹,

Maheshwari²,

Chauhan³

2011

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This paper presents an electronically tunable current/trans-impedance-mode biquad universal filter employing only single multi-output current controlled current conveyor trans-conductance amplifier (MO-CCCCTA) and two grounded capacitors. The proposed filter realizes all the standard filter functions i.e. low pass (LP), band pass (BP) and high pass (HP), notch and all pass (AP) filters in the current form at high impedance output through appropriate selection of the input signals, without any matching conditions. Simultaneously, it can also realize all the standard filter functions in trans-impedance form from the same circuit topology. The circuit does not require inverting-type input current signal(s) and double input current signal(s) to realize all the responses in the design. The validity of proposed filter is verified through PSPICE simulations.

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“…Current-mode circuits have been shown to have a wide variety of useful features, including the capability of operating with a large bandwidth at low supply voltages [2]. Companding filters are an interesting subclass of current-mode analog filters, with the potential for low-voltage operation and electronic tuning capabilities [3,4].…”

Section: Introductionmentioning

confidence: 99%

A low-voltage and low-power sinh-domain universal biquadratic filter for low-frequency applications

Khanday¹,

Shah²

2013

Turk J Elec Eng & Comp Sci

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Sinh-domain CMOS filters have favorable properties, such as a wide dynamic range at low supply voltage, compactness, linearity, and low power consumption. These properties are becoming increasingly important for biomedical applications that require extremely low-power dissipation and neuromorphic circuits that attempt to reproduce the biophysics of biological neurons and synapses. In this paper, a low-voltage sinh-domain universal biquadratic filter circuit is introduced. The circuit, aside from permitting the independent adjustment of pole frequency ( ω0) and the quality factor (Q), is free from matching conditions, capable of absorbing the shunt parasitic capacitances, amenable for monolithic integration, and composed of merely a few transconductor cells and grounded elements. The other features of the circuit are its low sensitivity and good linearity. Simulated results are obtained to prove the theoretical analyses and the filter shows a dynamic range of 59.17 dB and power consumption of only 19.2 nW.

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Current-mode continuous-time filters: two design approaches

Cited by 173 publications

References 9 publications

A 3rd-order current-mode filter in 0.12 μm CMOS

A 3rd-order current-mode filter in 0.12 μm CMOS

Single MO-CCCCTA-Based Electronically Tunable Current/Trans-Impedance-Mode Biquad Universal Filter

A low-voltage and low-power sinh-domain universal biquadratic filter for low-frequency applications

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