Analytical Synthesis of Current-Mode High-Order Single-Ended-Input OTA and Equal-Capacitor Elliptic Filter Structures With the Minimum Number of Components

Tu, Steve Hung-Lung; Chang, Chun-Ming; Ross, J.N.; Swamy, M.N.S.

doi:10.1109/tcsi.2007.905644

Cited by 51 publications

(38 citation statements)

References 18 publications

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“…3 was used. The aspect ratio of transistors are W/L=10μm/1μm for nMOS devices and W/L=5μm/1μm for pMOS devices [22]. The bias currents for OTA 3 to OTA 8 are chosen as 20μA.…”

Section: Simulation Resultsmentioning

confidence: 99%

Electronically tunable versatile voltage-mode MIMO OTA-C universal filter

Kumngern

Suwanjan

Dejhan

2011

The 17th Asia Pacific Conference on Communications

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This paper presents a new versatile high input impedance voltage-mode universal filter with multiple-input multiple-output (MIMO) based on single-ended operational transconductance amplifiers (OTAs) and grounded capacitors. The proposed circuit can work as a two-input four-output filter and a three-input single-output filter without changing the circuit topology. The natural frequency (ω o ) and the quality factor (Q) can be set orthogonally by adjusting the circuit components. The ω o can also be controlled electronically by varying the transconductance value of OTAs. The simulation results are performed to confirm the presented theory.

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“…3 was used. The aspect ratio of transistors are W/L=10μm/1μm for nMOS devices and W/L=5μm/1μm for pMOS devices [22]. The bias currents for OTA 3 to OTA 8 are chosen as 20μA.…”

Section: Simulation Resultsmentioning

confidence: 99%

Electronically tunable versatile voltage-mode MIMO OTA-C universal filter

Kumngern

Suwanjan

Dejhan

2011

The 17th Asia Pacific Conference on Communications

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“…The simple OTA was realized by the CMOS implementation in Fig. 2 using 0.35 μm CMOS process from TSMC and W/L = 5 μm/1 μm and W/L = 10 μm/1 μm for nMOS and pMOS transistors, respectively [20]. The power supplies are selected as V DD = −V SS = 1.65 V and bias currents for OTA 3 to OTA 6 are chosen as 20 μA.…”

Section: Simulation Resultsmentioning

confidence: 99%

Electronically tunable voltage-mode universal filter with two inputs four outputs employing single-ended OTAs and grounded capacitors

Kumngern

2011

2011 IEEE Colloquium on Humanities, Science and Engineering

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This paper presents a new voltage-mode electronically tunable universal filter with two-input four-output using six single-ended operational transconductance amplifiers (OTAs) and two grounded capacitors. The proposed circuit provides lowpass, bandpass and highpass voltage responses at a high impedance input terminal, which enable easy cascadability. The filter also offers an electronic control of the natural frequency through adjusting the bias current of the OTAs. The active and passive sensitivities are low. The performances of the proposed filter are simulated to confirm the presented theory.

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“…There are many papers concerning in the advantages and applications for current-mode signal processing. The advantages of the current-mode signal processing circuits can be found in [3][4][5], where the applications can be easily seen in many literature, for example filters [6,7], oscillator [8], multiplier [9], rectifier [10], square rooting [11], phase-locked loop [12], and etc. Many active elements able to function in current-mode such as OTA, current conveyor and Current Differencing Buffered Amplifier (CDBA), have been introduced to response these demands.…”

Section: Introductionmentioning

confidence: 99%

Current-controlled current differencing transconductance amplifier and applications in continuous-time signal processing circuits

Siripruchyanun

Jaikla

2009

Analog Integr Circ Sig Process

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This article presents the design for a basic current-mode building block for analogue signal processing, named as Current Controlled Current Differencing Transconductance Amplifier (CCCDTA). Its parasitic resistances at two current input ports can be controlled by an input bias current. As it can be applied in current-mode of all terminals, it is very suitable to use in a current-mode signal processing, which is continually more popular than a voltage one. The proposed element is realized in a bipolar technology and its performance is examined through PSPICE simulations. They display usability of the new active element, where the maximum bandwidth is 65 MHz. The CCCDTA performs low-power consumption and tuning over a wide current range. In addition, some examples as a current-mode universal biquad filter, a current-mode multiplier/divider and floating inductance simulator are included. They occupy only single CCCDTA.

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Analytical Synthesis of Current-Mode High-Order Single-Ended-Input OTA and Equal-Capacitor Elliptic Filter Structures With the Minimum Number of Components

Cited by 51 publications

References 18 publications

Electronically tunable versatile voltage-mode MIMO OTA-C universal filter

Electronically tunable versatile voltage-mode MIMO OTA-C universal filter

Electronically tunable voltage-mode universal filter with two inputs four outputs employing single-ended OTAs and grounded capacitors

Current-controlled current differencing transconductance amplifier and applications in continuous-time signal processing circuits

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