An Electronically Controllable Voltage-mode First-order All-Pass Filter Using Only Single CCCDTA

2008 ◽  
Author(s):  
Chaiya Tanaphatsiri ◽  
Winai Jaikla ◽  
Montree Siripruchyanun
Keyword(s):  
Pass Filter ◽  
First Order ◽  
Voltage Mode ◽  
Electronically Controllable

scholarly journals Design and Experiment of Electronically Tunable Voltage-Mode Biquad and Output Current Amplitude Oscillator

2021 ◽  
Vol 11 (16) ◽  
pp. 7357
Author(s):  
San-Fu Wang ◽  
Hua-Pin Chen ◽  
Yitsen Ku ◽  
Fang-Yu Liu
Keyword(s):  
Communication Systems ◽  
Band Pass Filter ◽  
Output Current ◽  
Third Order ◽  
Pass Filter ◽  
Voltage Mode ◽  
The Third ◽  
Band Pass ◽  
Electronically Tunable ◽  
Electronically Controllable

This study presents an electronically tunable configuration for the design of a voltage-mode (VM) biquad with four input terminals and three output terminals. The proposed circuit employs four operational transconductance amplifiers (OTAs) and two grounded capacitors. Depending on the selections of the four input voltage signals, all the standard filtering functions can be realized. The proposed configuration simultaneously provides VM inverting band-pass, non-inverting low-pass, and non-inverting band-reject filtering functions without any component-matching choices. It offers the features of a resistorless structure, high-input impedance, electronic control of the pole frequency and quality factor, and low active and passive sensitivities. The measured power dissipation of the biquad is 0.96 W under 32 mA constant output current. The measured 1 dB power gain compression point of the output inverting band-pass filter is −7 dBm. The measured value of the third-order intercept point is 5.136 dBm, and the measured value of the third-order intermodulation distortion is −50.83 dBc. Moreover, the measured value of the spurious-free dynamic range is 53.49 dB, and the figure-of-merit of the biquad is 268.75 × 103. In addition, an electronically controllable quadrature oscillator (QO) with amplitude of output current can be realized using the proposed biquad. The proposed electronically controllable QO can provide an amplitude modulation signal or an amplitude shift keying signal, and is widely applied in signal processing systems and electronic communication systems. PSpice simulations and experimental results are accomplished.

scholarly journals CDDITA-Based Voltage-Mode First Order All Pass Filter Configuration

2015 ◽  
Vol 06 (11) ◽  
pp. 252-256 ◽  
Author(s):  
Dinesh Prasad ◽  
Kuldeep Panwar ◽  
D. R. Bhaskar ◽  
Mayank Srivastava
Keyword(s):  
Pass Filter ◽  
First Order ◽  
Voltage Mode ◽  
Filter Configuration

scholarly journals Design of Voltage Mode Electronically Tunable First Order All Pass Filter in ±0.7 V 16 nm CNFET Technology

Electronics ◽  
2019 ◽  
Vol 8 (1) ◽  
pp. 95 ◽  
Author(s):  
Muhammad Masud ◽  
Abu A’ain ◽  
Iqbal Khan ◽  
Nasir Husin
Keyword(s):  
Low Voltage ◽  
Wide Frequency Range ◽  
Passive Components ◽  
Pass Filter ◽  
First Order ◽  
Voltage Mode ◽  
Tunable Range ◽  
Low Voltage Operation ◽  
Unity Gain ◽  
Electronically Tunable

A novel voltage mode first order active only tuneable all pass filter (AOTAPF) circuit configuration is presented. The AOTAPF has been designed using ±0.7 V, 16 nm carbon nanotube field effect transistor (CNFET) Technology. The circuit uses CNFET based varactor and unity gain inverting amplifier (UGIA). The presented AOTAPF is realized with three N-type CNFETs and without any external passive components. It is to be noted that the realized circuit uses only two CNFETs between its supply-rails and thus, suitable for low-voltage operation. The electronic tunability is achieved by varying the voltage controlled capacitance of the employed CNFET varactor. By altering the varactor tuning voltage, a wide tunable range of pole frequency between 34.2 GHz to 56.9 GHz is achieved. The proposed circuit does not need any matching constraint and is suitable for multi-GHz frequency applications. The presented AOTAPF performance is substantiated with HSPICE simulation program for 16 nm technology-node, using the well-known Stanford CNFET model. AOTAPF simulation results verify the theory for a wide frequency-range.

scholarly journals Single Commercially Available IC-Based Electronically Controllable Voltage-Mode First-Order Multifunction Filter with Complete Standard Functions and Low Output Impedance

Sensors ◽  
2021 ◽  
Vol 21 (21) ◽  
pp. 7376
Author(s):  
Winai Jaikla ◽  
Unchittha Buakhong ◽  
Surapong Siripongdee ◽  
Fabian Khateb ◽  
Roman Sotner ◽  
...  
Keyword(s):  
Phase Response ◽  
Experimental Result ◽  
Pass Band ◽  
Voltage Gain ◽  
Active Device ◽  
Pass Filter ◽  
Low Pass Filter ◽  
First Order ◽  
Voltage Mode ◽  
Order Filter

This paper presents the design of a voltage-mode three-input single-output multifunction first-order filter employing commercially available LT1228 IC for easy verification of the proposed circuit by laboratory measurements. The proposed filter is very simple, consisting of a single LT1228 as an active device with two resistors and one capacitor. The output voltage node is low impedance, resulting in an easy cascade-ability with other voltage-mode configurations. The proposed filter provides four filter responses: low-pass filter (LP), high-pass filter (HP), inverting all-pass filter (AP−), and non-inverting all-pass filter (AP+) in the same circuit configuration. The selection of output filter responses can be conducted without additional inverting or double gains, which is easy to be controlled by the digital method. The control of pole frequency and phase response can be conducted electronically through the bias current (IB). The matching condition during tuning the phase response with constant voltage gain is not required. Moreover, the pass-band voltage gain of the LP and HP functions can be controlled by adjusting the value of resistors without affecting the pole frequency and phase response. Additionally, the phase responses of the AP filters can be selected as both lagging or leading phase responses. The parasitic effects on the filtering performances were also analyzed and studied. The performances of the proposed filter were simulated and experimented with a ±5 V voltage supply. For the AP+ experimental result, the leading phase response for 1 kHz to 1 MHz frequency changed from 180 to 0 degrees. For the AP− experimental result, the lagging phase response for 1 kHz to 1 MHz frequency changed from 0 to −180 degrees. The design of the quadrature oscillator based on the proposed first-order filter is also included as an application example.

scholarly journals CMOS Realizable and Highly Cascadable Structures of First-Order All-Pass Filters

2021 ◽  
Vol 18 (14) ◽  
Author(s):  
Jitender Jitender ◽  
Jitendra MOHAN ◽  
Bhartendu CHATURVEDI
Keyword(s):  
Second Generation ◽  
Cmos Technology ◽  
Current Conveyor ◽  
Passive Component ◽  
Pass Filter ◽  
Quadrature Oscillator ◽  
First Order ◽  
Voltage Mode ◽  
Fully Differential ◽  
Low Sensitivity

Two novel resistorless structures of a first-order voltage-mode all-pass filter are presented in the paper. Both the structures employ a fully differential second-generation current conveyor (FDCCII) as the primary active element, in addition to an active resistor. A grounded capacitor is the only passive component used in both the structures. In both the structures, CMOS realization of FDCCII is utilized; hence, these structures are CMOS compatible. Some of the other highly demanded features possessed by the presented all-pass structures are: a simple circuit topology, electronic tunability, high input impedance, constraint-free operation in terms of passive component matching, and low sensitivity figures. The theoretical performances under ideal and non-ideal scenarios are presented in detail. Furthermore, the proposed idea is extended to an Nth-order voltage-mode all-pass filter and a quadrature oscillator to explore some of the possible applications. PSPICE simulation results verify the theoretical claims of the presented all-pass filters. HIGHLIGHTS Two novel resistorless structures of first-order all-pass filters based on fully differential second-generation current conveyor are presented Performance of the proposed structures are thoroughly described in ideal and non-ideal scenarios Theoretically described details of the proposed structures are verified by carrying simulations on PSPICE using 180 nm CMOS technology An Nth-order all-pass filter and a quadrature oscillator are also presented as applications GRAPHICAL ABSTRACT

scholarly journals Tunable First-Order Resistorless All-Pass Filter with Low Output Impedance

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Parveen Beg
Keyword(s):  
Building Block ◽  
Active Element ◽  
Higher Order ◽  
Current Conveyor ◽  
Passive Component ◽  
Output Impedance ◽  
Pass Filter ◽  
Mos Transistor ◽  
First Order ◽  
Voltage Mode

This paper presents a voltage mode cascadable single active element tunable first-order all-pass filter with a single passive component. The active element used to realise the filter is a new building block termed as differential difference dual-X current conveyor with a buffered output (DD-DXCCII). The filter is thus realized with the help of a DD-DXCCII, a capacitor, and a MOS transistor. By exploiting the low output impedance, a higher order filter is also realized. Nonideal and parasitic study is also carried out on the realised filters. The proposed DD-DXCCII filters are simulated using TSMC the 0.25 µm technology.

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