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Chapter17
Chapter17

...  Alternating current flows in a capacitive circuit with ac voltage applied.  A smaller capacitance allows less current, which means more XC with more ohms of opposition.  Lower frequencies for the applied voltage result in less current and more XC.  With a steady dc voltage source (zero frequenc ...
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... of a two-port network (circuit), such as the one shown below, represents the ratio of the output voltage to the input voltage as the frequency of the input voltage is varied. In other words, ...
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... time delay of 1µs prevents the device from accidentally entering shutdown due to logic skews when switching between transmit and receive modes. Holding DE low and RE high for at least 1ms guarantees that the MAX3430 enters shutdown. In shutdown, the device consumes 100µA supply current. ...
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... This smartly styled large scale Electronic Voltmeter although designed especially for servicing television receivers, will prove equally in dispensable for testing and aligning A.M. or FM receivers, measuring AVC, grid bias and screen grid voltage in high impedance circuits, and for testing electron ...
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... VREFB. The VREFT and VREFB voltages set the analog input span limits FS+ and FS–, respectively. Any voltages at AIN greater than REFT or less than REFB causes ADC over-range, which is signaled by OVR going high when the conversion result is output. ...
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... The OPA2830 is a dual, low-power, single-supply, wideband, voltage-feedback amplifier designed to operate on a single +3V or +5V supply. Operation on ±5V or +10V supplies is also supported. The input range extends below ground and to within 1.8V of the positive supply. Using complementary common-emi ...
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... voltage−current product at the amplifier's input. Since power = voltage × current this ensures the highest possible input power for a given signal emf, V ′s . This result is a general one which arises because the amount of power generated by a source can never be infinite. All signal sources will ha ...
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... The MAX3157 is a high CMRR RS-485/RS-422 data-communications interface providing ±50V isolation in a hybrid microcircuit. A single +5V supply on the logic side powers both sides of the interface, with external ±50V capacitors transferring power from the logic side to the isolated side. Each MAX3157 ...
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... ◇The output voltage of the power supply is as described in the specifications. ◇The voltage/current of the input/output terminals conforms to the ratings in the specifications. ◇Input/output terminals are not incorrectly wired or accidentally short-circuited. ◇Do not use with the motor except the st ...
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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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