A New Instrumentation Amplifier Architecture Based on Differential Difference Amplifier for Biological Signal Processing

Lock - In Amplifier based on Virtual Instrumentation

When a slowly varying voltage is detected the main problem is the noise especially when it is several times greater than the signal itself. A lock-in amplifier is used to measure the small signals in presence of noise. The aim of this paper is to do a digital lock-in amplifier based on virtual instrument language LabVIEW and later on, it will replace a practice of a subject from the Physics’ de...

The Differential Difference Operational Floating Amplifier: A New Block For Analog Signal Processing - Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on

A wide-range differential difference operational floating amplifier (DDOFA) is introduced. The DDOFA is a new block useful for continuous-time analog signal processing. The DDOFA is realized using a differential difference transconductor with large signal handling capability and a single input differential output current op-amp. The DDOFA forces two differential voltages to the same value and p...

Amplification and Filtering Of ECG Signal Using Instrumentation Amplifier

This paper deals with the process of generation of ECG signal and discusses the general shape of the ECG waveform and its generation by using the three bipolar limb lead method based on Einthoven’s Triangle. Since the ECG signal has amplitude in mV range, its observation requires the use of Instrumentation Amplifier and moreover, filter is also used for smoothening the signal. Index Items: Eint...

Design of an Instrumentation Amplifier

A Predictable Fixed Gain Instrumentation Amplifier

This paper presents a predictable fixed gain instrumentation amplifier using switched capacitor instead of resistor to improve the accuracy of the gain as 10. This instrumentation amplifier builds up by two operational amplifiers which connect by switched capacitor. These switched capacitors are used to stable the whole circuit, fix the gain of total instrumentation amplifier. Using two operati...