We describe a pocket-sized ultrasound driver with an ultralow-output impedance amplifier circuit (less than 0.05 ohms) that can transfer more than 99% of the voltage from a power supply to the ultrasound transducer with minimal reflections. The device produces high-power acoustical energy waves while operating at lower voltages than conventional ultrasound driving systems because energy losses ...

The second order universal voltage-mode filter using voltage differencing differential difference amplifiers (VDDDAs) has been proposed. It has high input impedance voltage-mode biquad filter with orthogonal tune of natural frequency and quality factor. The proposed filter simultaneously provides five filter responses: low-pass (LP), high-pass (HP), band-reject (BR), all-pass (AP) and band-pass...

This paper describes a CMOS rail-to-rail class AB operational amplifier designed to have extremely low output impedance and large current-drive capability. The amplifier uses an innovative output stage, having both source follower and common source stages working simultaneously throughout the output common-mode range. The source follower ensures low output impedance, which enables it to drive r...

Floating Gate MOS (FGMOS) transistors can be very well implemented in lieu of conventional MOSFET for design of a low-voltage, low-power current mirror. Incredible features of flexibility, controllability and tunability of FGMOS yields better results with respect to power, supply voltage and output swing. This paper presents a new current mirror designed with FGMOS which exhibit high output imp...

INTRODUCTION This application note describes the circuit architecture and details required to measure the impedance profile of a grounded sensor using the AD5933 impedance-to-digital converter. The AD5933 is a high precision impedance converter system (see Figure 1) that combines an on-board frequency generator with a 12-bit, 1 MSPS, analog-to-digital converter (ADC). The frequency generator al...

A new first order voltage mode all-pass filter circuit using two differential difference current conveyors (DDCCs) (with suppressed output stages) as active elements and two passive components is proposed. The given circuit enjoys the features of high input impedance and low output impedance, which is desirable feature for voltage-mode circuits. In spite of employing two active elements the cir...

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...

We present a novel multifunction inverse biquad configuration based on current feedback operational amplifiers (CFOAs) and grounded passive elements. The proposed scheme can be used to realize inverse lowpass, inverse bandpass and inverse highpass filter functions. The relevant coefficients of the inverse filters are orthogonal adjustable by independent passive elements. All the passive element...