New first order multifunction filter employing operational transresistance amplifier

Banerjee, Khusi; Ranjan, Ashish; Paul, Sajal K.

doi:10.1109/codec.2012.6509218

Cited by 14 publications

(15 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Inspection of equation 43shows that, due to the transistor mismatch, the low frequency gain of the lossy integrator will deviate from unity as predicted by equations (4) and (5). This effect is not significant and can be easily compensated, if required, by an additional current amplifier or attenuator.…”

Section: Lossy Integratorsmentioning

confidence: 99%

“…On the other hand it is well known that the performance of high-order filters may be preferable than lower-order counterparts in some applications [1]. Thus, using high order filters [2], [3], superior performance can be achieved compared to that obtainable using low-order filters [4], [5]. Moreover, high order filters can save area on the chip.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Electronically Tunable Current-mode High-order Ladder Low-pass Filters Based on CMOS Technology

Abuelma’atti¹,

Kunto²,

Prommee³

2015

RADIOENGINEERING

View full text Add to dashboard Cite

This paper describes the design of current mode low-pass ladder filters based on CMOS technology. The filters are derived from passive RLC ladder filter prototypes using new CMOS lossy and lossless integrators. The all-pole and Elliptic approximations are used in the proposed low-pass filter realizations. The proposed two types of filter can be electronically tuned between 10 kHz and 100 MHz through bias current from 0.03 µA to 300 µA. The proposed filters use 1.5 V power supply with 3 mW power consumption at 300 µA bias current. The proposed filters are resistorless, use grounded capacitors and are suitable for further integration. The total harmonic distortion (THD) of the low-pass filters is less than 1% over the operating frequency range. PSPICE simulation results, obtained by using TSMC 0.18µm technology, confirm the presented theory.

show abstract

Section: Lossy Integratorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electronically Tunable Current-mode High-order Ladder Low-pass Filters Based on CMOS Technology

Abuelma’atti¹,

Kunto²,

Prommee³

2015

RADIOENGINEERING

View full text Add to dashboard Cite

show abstract

“…Transresistance-mode (RM) and transconductance-mode (TM) universal first order filters are reported in [22,28,31] (Figure 2), respectively. The universal first-order filters in voltage-mode (VM) configuration are proposed in [23,25,27,32,33,38,40,[42][43][44]. The comparison between the proposed first-order universal filter and the previous ones presented in is summarized in Table 1.…”

Section: Introductionmentioning

confidence: 99%

“…Most of the proposed universal first-order filters are emphasized for the on-chip realization of both CMOS [21][22][23][24][25][26][27][28][29][30][31][32][34][35][36]40,41,45] or BJT [33,37,39] technology. As stated above, the implementation of an on-chip circuit is quite costly.…”

mentioning

confidence: 99%

“…Most of the universal first-order filters shown in Table 1 can provide three responses: low-pass, high-pass, and all-pass functions (except in [22], which gives only two filtering responses). However, the lagging and leading phase responses of the all-pass filters in [21][22][23][24][25][26][27][28][29][30][31]33,36,38,[40][41][42][43] are not given in the same circuit structure.…”

mentioning

confidence: 99%

See 1 more Smart Citation

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

Jaikla

Buakhong

Siripongdee

et al. 2021

Sensors

View full text Add to dashboard Cite

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.

show abstract

CFOA‐based simple mixed‐mode first‐order universal filter configurations

Bhaskar

Raj

Senani

et al. 2022

Circuit Theory & Apps

View full text Add to dashboard Cite

This brief communication presents two current feedback op-amp (CFOA)based simple first-order mixed-mode universal filter topologies-one of them providing first-order low-pass (LP), high pass (HP), and all pass (AP)-all the three filters in voltage-mode (VM)/trans-admittance-mode (TAM) while the other one realizing the quoted three functions in current-mode (CM)/transimpedance-mode (TIM). Except the all pass filter realization from the first configuration which needs a second CFOA also as gain-of-two amplifier, in all the remaining cases of both the configurations, only a single CFOA is needed. The other notable features of the circuits are employment of only three resistors and a grounded capacitor (as preferred for IC implementation) and the availability of independent tunability of the gain (H 0 ) and cut-off frequency/pole frequency (ω 0 ) of all the three filters, in both the cases. In spite of not offering ideally infinite input impedance in VM/TAM mode and ideally zero input impedance in CM/TIM mode, the circuits still possess easy cascadability due to providing a voltage output from a low-output impedance terminal W while the current output from the high output impedance terminal Z. Non-ideal and sensitivity analyses have also been carried out. The workability of the proposed circuits has been demonstrated through PSPICE simulations and experimental results using the commercially available AD844-type IC CFOA.

show abstract

New first order multifunction filter employing operational transresistance amplifier

Cited by 14 publications

References 8 publications

Electronically Tunable Current-mode High-order Ladder Low-pass Filters Based on CMOS Technology

Electronically Tunable Current-mode High-order Ladder Low-pass Filters Based on CMOS Technology

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

CFOA‐based simple mixed‐mode first‐order universal filter configurations

Contact Info

Product

Resources

About