The design of a CMOS operational mirrored amplifier (OMA) suitable for high frequency applications is proposed. The CMOS operational mirrored amplifier is developed using class AB operational amplifier and two current mirrors. To obtain a wide bandwidth and high stability, HF feedforward techniques have been used. These techniques made the proposed circuit suitable for continuous – time analog ...

A new current source for low-voltage applications is proposed. This current source is well suited for biasing differential pairs and source followers. Measured compliance voltage is slightly smaller than that of a single transistor. Its output resistance is a factor of 25 larger than that of a single transistor current source and was measured to be 8 M : The use of the new current source improv...

State-of-the-art logarithmic amplifiers use a transimpedance technique based on the exponential dependence between input current and output voltage as exhibited by p-n junction diodes, bipolar transistors and MOS transistors in the subthreshold region. Presented is a CMOS current-input current-output logarithmic amplifier based on a translinear Ohm’s law principle which involves a floating volt...

In this paper a reconfigurable switched-current sigma delta modulator for power amplifier is shown, which is a suitable topology to save energy and integrated area in portable applications. Results have shown the correct operation of a 1.8V, 0.18μm CMOS reconfigurable switched-current sigma delta modulator with 11bits dynamic range within 1MHz and 7.8bits within 3.8MHz bandwidth.

This paper presents a balanced receiver structure suitable for wireless infrared data communications. The receiver provides a fixed photodiode bias voltage with the use of a regulated cascode input stage. Together with an active feedback loop used to eliminate dc photocurrents, the receiver implements ac coupling without the need for matching capacitors. Differential sensing of the photodiode c...

This paper presents two schemes of high performance CMOS current mirror, one of them is used for operational transconductance amplifier (OTA) in analog VLSI systems. The linearity, output impedance, bandwidth and accuracy are the most parameters to determine the performance of the current mirror. Here a comparison of two architectures based on same architecture of the amplifier is presented. Th...