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Physics Equation List :Form 5 - One
Physics Equation List :Form 5 - One

... The current flow into a resistor = the current flow inside the resistor = the current flows out from the The current flow into a parallel circuit is equal to the resistor sum of the current in each branches of the circuit. IA = IB = IC I = I1 + I2 Example ...
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... As discussed previously in section II-B the performance of the error amplifier is directly correlated with the PSSR of the LDO system. The intuitive mode analysis of P SRR helps in the definition of error amplifier specifications. Since the PSRR specifications of the LDO system are −70dB@1kHz, the e ...
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... currents flowing in branches of the circuit. For example, in Fig. 2.1 the currents flowing in the four branches connected to the node have been defined as I1, I2, I3, I4 and Kirchhoff’s Current Law allows us to write down an equation relating these currents. Looking closely at Fig. 2.1, we see that ...
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... Adding many resistors in parallel makes it easier for the current to flow. If I keep adding resistors in parallel, it eventually becomes “infinitely easy” for the current to flow. (It has more ways to go, which lowers the resistance.) This can also be seen from the equation: ...
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... to minimize its introduction in the first place (Webster, 1998). Appropriate shielding, sensor design, wiring, and grounding practice has very significant impact in terms of reducing noise onto the sensor reading, while judicial use of basic filtering and amplification can subsequently improve the S ...
lecture6
lecture6

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Operational amplifier



An operational amplifier (""op-amp"") is a DC-coupled high-gain electronic voltage amplifier with a differential input and, usually, a single-ended output. In this configuration, an op-amp produces an output potential (relative to circuit ground) that is typically hundreds of thousands of times larger than the potential difference between its input terminals.Operational amplifiers had their origins in analog computers, where they were used to do mathematical operations in many linear, non-linear and frequency-dependent circuits. The popularity of the op-amp as a building block in analog circuits is due to its versatility. Due to negative feedback, the characteristics of an op-amp circuit, its gain, input and output impedance, bandwidth etc. are determined by external components and have little dependence on temperature coefficients or manufacturing variations in the op-amp itself.Op-amps are among the most widely used electronic devices today, being used in a vast array of consumer, industrial, and scientific devices. Many standard IC op-amps cost only a few cents in moderate production volume; however some integrated or hybrid operational amplifiers with special performance specifications may cost over $100 US in small quantities. Op-amps may be packaged as components, or used as elements of more complex integrated circuits.The op-amp is one type of differential amplifier. Other types of differential amplifier include the fully differential amplifier (similar to the op-amp, but with two outputs), the instrumentation amplifier (usually built from three op-amps), the isolation amplifier (similar to the instrumentation amplifier, but with tolerance to common-mode voltages that would destroy an ordinary op-amp), and negative feedback amplifier (usually built from one or more op-amps and a resistive feedback network).
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