A low-voltage current conveyor using inverter-based error amplifier and its oscillator application

Abstract

A low-voltage second-generation current conveyor (CCII) and its oscillator application suitable for portable systems are proposed in the paper. The proposed current conveyor is based on an inverter-based low-voltage error amplifier and a current mirror. There are no on-chip capacitors in the proposed current conveyor, and it can be designed with standard CMOS digital processes and hence will reduce the cost of chip fabrication. Moreover, the architecture of the proposed circuit without cascoded MOSFET transistors is easily designed and suitable for low-voltage operation. The CCII could be operated in a very low supply voltage such as ±0.5 V. The proposed CCII has been fabricated with TSMC 0.18 μm CMOS process and applied to low-voltage CCII oscillator suitable for portable systems.

A New Fully Closed-Loop, High-Precision, Class-AB CCII for Differential Capacitive Sensor Interfaces

“…However, the current-mode approach could easily overcome this limitation; therefore, it represents an increasingly attractive methodology. One of the most famous CM active building blocks (ABBs) is the second-generation current conveyor (CCII), which inherits and expands the functionalities of its predecessor, the first-generation current conveyor (CCI) [30][31][32][33][34][35][36][37][38][39].…”

CCCCTA-based resistorless voltage and current mode quadrature oscillator

“…Sinusoidal oscillators are extremely useful circuits in analog signal processing, and many voltage-mode and current-mode oscillators based on different types of active building blocks have been proposed in their implementation [1,2,3,4,5]. In this respect, resistorless and electronically controlled realizations of sinusoidal oscillators are the attention for many researchers [6,7,8,9,10,11,12].…”

Tunable current-mode and voltage-mode quadrature oscillator using a DVCCTA

“…Current-mode active building blocks have been receiving considerable attention owing to their larger dynamic range, greater linearity, wider bandwidth and low power consumption with respect to operational amplifier-based circuits [1]. Moreover, analogue signal processing in low supply voltages can be best accomplished in the current-mode and hence low voltage currentmode active building blocks operating in the current-mode and their applications are important in sinusoidal oscillators [2,3,4,5,6,7]. In 2009, a new active building block for analogue signal processing, namely, differential voltage current conveyor transconductance amplifier (DVCCTA), was introduced [8].…”