Comments on “SITO electronically tunable high output impedance current-mode universal filter”

2006 ◽  
Vol 50 (3) ◽  
pp. 271-272 ◽  
Author(s):  
Erkan Yuce
Keyword(s):  
Current Mode ◽  
Output Impedance ◽  
Universal Filter ◽  
High Output Impedance ◽  
Electronically Tunable ◽  
High Output

scholarly journals Electronically Tunable Mixed-Mode Universal Filter Employing a Single Active Block and a Minimum Number of Passive Components

2020 ◽  
Vol 11 (1) ◽  
pp. 55
Author(s):  
Mohammad Faseehuddin ◽  
Norbert Herencsar ◽  
Musa Ali Albrni ◽  
Jahariah Sampe
Keyword(s):  
Mixed Mode ◽  
Supply Voltage ◽  
Current Mode ◽  
Output Impedance ◽  
Universal Filter ◽  
Current Output ◽  
Filter Performance ◽  
Single Output ◽  
High Output Impedance ◽  
Electronically Tunable

A recently developed active building block, namely Voltage Differencing Extra X Current Conveyor (VD-EXCCII), is employed in the design of multi input single output (MISO), electronically tunable mixed-mode universal filter. The filter provides low pass (LP), high pass (HP), band pass (BP), band reject (BR) and all pass (AP) responses in current-mode (CM), voltage-mode (VM), trans-impedance-mode (TIM) and trans-admittance-mode (TAM). The filter employs a single VD-EXCCII, three resistors and two capacitors. Additionally, a CM single input multi output (SIMO) filter can be derived from the same circuit topology by only adding current output terminals. The attractive features of the filter include: (i) the ability to operate in all four modes, (ii) the tunability of the Q factor independent of pole frequency, (iii) the low output impedance for the VM filter, (iv) the high output impedance current output for CM and TAM filters and (v) no requirement for double/negative input signals (voltage/current) for response realization. The VD-EXCCII and its layout is designed and validated in Cadence Virtuoso using 0.18 µm pdk from Silterra Malaysia with a supply voltage of ±1.25 V. The operation of the filter is examined at the 8.0844 MHz characteristic frequency. A non-ideal parasitic and sensitivity analysis is also carried out to study the effect of process and components spread on the filter performance.

High output impedance current-mode first-order allpass networks with four grounded components and two CCIIs

2006 ◽  
Vol 93 (9) ◽  
pp. 613-621 ◽  
Author(s):  
J.-W. Horng ◽  
C.-L. Hou ◽  
C.-M. Chang ◽  
W.-Y. Chung ◽  
H.-L. Liu ◽  
...  
Keyword(s):  
Current Mode ◽  
Output Impedance ◽  
First Order ◽  
High Output Impedance ◽  
High Output
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