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High CMRR Instrumentation Amplifier (Schematic and Layout) design for biomedical applications

Instrumentation amplifiers are intended to be used whenever acquisition of a useful signal is difficult. IA’s must have extremely high input impedances because source impedances may be high and/or unbalanced. bias and offset currents are low and relatively stable so that the source impedance need not be constant. Balanced differential inputs are provided so that the signal source may be referenced to any reasonable level independent of the IA output load reference. Common mode rejection, a measure of input balance, is very high so that noise pickup and ground drops, characteristic of remote sensor applications, are minimized.Care is taken to provide high, well characterized stability of critical parameters under varying conditions, such as changing temperatures and supply voltages. Finally, all components that are critical to the performance of the IA are internal to the device. The precision of an IA is provided at the expense of flexibility. By committing to the one specific task of…

10 Band Graphic Equalizer Circuit

This 10 Band Graphic Equalizer Circuit a single chip, IC TL074 to achieve a 5-band graphic equalizer for use in systems of high fidelity audio. The 5-band graphic equalizer is true for radio-cassette player and car stereos. This unit features: low distortion, low noise, wide operating voltage range (3.5 V to 16V), low consumption (5 mA), Wide Dynamic Range (SD = 2.1Vrms/VCC = 8V) and built an amplifier input and output buffer.

The TL074 is a five-point graphic equalizer that has integrated all the functions necessary for a cochlear implant. The IC is the system of five sounds and control input and an output buffer amplifier. The following PDF contains detailed information on the wiring diagram for the 5-band graphic equalizer with a single IC / chip (BA3812L). The circuit shown in the table of works about five frequency bands: 100 Hz, 300 Hz, 1 kHz, 3 kHz, 10 kHz.