Abstract
This paper describes the realization of the new configuration of an active element namely, Z Copy Current Follower Transconductance Amplifier (ZC-CFTA). In this study, the elliptic 6th order voltage-mode (VM) Band-pass filter was configured based on the ZC-CFTA, which operates at a high frequency of about 30 MHz. The active element also contains floated and grounded inductance with one capacitor. The ZC-CFTA which is an ABB (Active Building Block) is configured with a passive element that is the 6th order elliptic Band Pass Filter. The results LT-SPICE software simulation using 0.18µm CMOS processing parameter show that the designed filter could be operated at a supply voltage of 0.9V and it offers the advantages of a small size and high gain.
Highlights
Analog filter circuits are continuously developed for reducing die areas and increasing their performance, for example, high-frequency response, electronically tunable and uses less active devices
The input circuitry of the current differencing transconductance amplifier (CDTA) consists of the current differencing unit (CDU), which is followed by the operational transconductance amplifier (OTA) [2]
It may cause some noise injection into the monolithic circuit. This drawback of CDU-based analog building blocks (ABBs) was previously discussed regarding another such ABB so-called current differencing buffered amplifier (CDBA) [6,7]. To avoid this problem, the CDTA has been simplified by replacing the CDU by a simple current follower (CF) and the appropriate element called current follower transconductance amplifier (CFTA) has been presented in 2008 [8]
Summary
Analog filter circuits are continuously developed for reducing die areas and increasing their performance, for example, high-frequency response, electronically tunable and uses less active devices. Voltage-mode (VM) Elliptic ladder band-pass filter based on ZCCFTAs are presented in [3] It suffers from a large number of passive devices and cannot operate in high frequency.In the current differencing transconductance amplifier (CDTA) has been introduced in 2003 [1]. It may cause some noise injection into the monolithic circuit This drawback of CDU-based analog building blocks (ABBs) was previously discussed regarding another such ABB so-called current differencing buffered amplifier (CDBA) [6,7]. To avoid this problem, the CDTA has been simplified by replacing the CDU by a simple current follower (CF) and the appropriate element called current follower transconductance amplifier (CFTA) has been presented in 2008 [8]. To increase the universality of the conventional CDTA, the "Z-current copy"
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