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LM139/LM239/LM339/LM2901/LM3302 Low Power Low Offset
LM139/LM239/LM339/LM2901/LM3302 Low Power Low Offset

... Note 1: For operating at high temperatures, the LM339/LM339A, LM2901, LM3302 must be derated based on a 125˚C maximum junction temperature and a thermal resistance of 95˚C/W which applies for the device soldered in a printed circuit board, operating in a still air ambient. The LM239 and LM139 must b ...
Current monitoring relay SRN mecotron® 2 Functions
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MC33730, Switch Mode Power Supply with Multiple Linear
MC33730, Switch Mode Power Supply with Multiple Linear

... The 33730 is a multiple output power supply integrated circuit for automotive applications. The integrated circuit (IC) incorporates a switching regulator, which operates over a wide input voltage range from 4.5 to 26.5 V. The step-down switching regulator uses a fixed frequency pulsewidth modulatio ...
LT1083/LT1084/LT1085 - 7.5A, 5A, 3A Low
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... short-circuit protected, and have safe area protection as well as thermal shutdown to turn off the regulator should the junction temperature exceed about 165°C. These regulators are pin compatible with older 3-terminal adjustable devices, offer lower dropout voltage and more precise reference tolera ...
AN2983
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... Constant current inverse buck LED driver using L6562A Introduction Whenever a lighting application, such as street lighting for example, requires an elevated number of LEDs, there are basically two solutions: the first is to connect all the diodes in series in a single "string"; the second is to pla ...
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Presentation - International Spacewire Conference 2008
Presentation - International Spacewire Conference 2008

MAX1717 Dynamically Adjustable, Synchronous Step-Down Controller for Notebook CPUs General Description
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... accepts two 5-bit DAC settings with only five digital input pins. Output voltage transitions are accomplished with a proprietary precision slew-rate control† that minimizes surge currents to and from the battery while guaranteeing “just-in-time” arrival at the new DAC setting. High DC precision is e ...
AN-EVAL3BR2280JZ
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... the error amplifier and a driver stage. Compensation network C26, C27, R23, R24, R25, R26 and R27 constitutes the external circuitry of the error amplifier of IC21. This circuitry allows the feedback to be precisely matched to dynamically varying load conditions and provides stable control. The maxi ...
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... A crystal oscillator is constructed from a piece of quartz crystal that is cut and shaped to the appropriate size. ...
LM139/LM239/LM339/LM2901/LM3302 Low Power Low Offset
LM139/LM239/LM339/LM2901/LM3302 Low Power Low Offset

... during the output voltage transition intervals as the comparator changes states. Power supply bypassing is not required to solve this problem. Standard PC board layout is helpful as it reduces stray input-output coupling. Reducing this input resistors to < 10 kΩ reduces the feedback signal levels an ...
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AAT4626 数据资料DataSheet下载
AAT4626 数据资料DataSheet下载

... turned on into large capacitive loads without activating the FAULT flags. The open drain FAULT outputs can be con- nected directly to system controllers driven by voltage levels less than the IN pin voltage without additional level shifting circuitry. Each of the two load switches is turned on and o ...
LM139/LM239/LM339/LM2901/LM3302 Low Power Low Offset
LM139/LM239/LM339/LM2901/LM3302 Low Power Low Offset

... during the output voltage transition intervals as the comparator changes states. Power supply bypassing is not required to solve this problem. Standard PC board layout is helpful as it reduces stray input-output coupling. Reducing this input resistors to < 10 kΩ reduces the feedback signal levels an ...
Chapter 2 Technical Terms and Characteristics
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... it may exceed the dead time of the upper and lower transistors, thereby causing a short-circuit. It is also important to be aware that if the switching time (tf) Switching time vs. Collector current (typ.) is too short, the transient current change rate Vcc=600V,VGE=±15V,Rg=1.6Ω,Tj= 125°C (di/dt) wi ...
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AAT2552 数据资料DataSheet下载
AAT2552 数据资料DataSheet下载

... termination. The charging current is programmable via external resistor from 30mA to 500mA. In addition to these standard features, the device offers over-voltage, current limit, and thermal protection. The step-down converter is a highly integrated converter operating at a 1.5MHz switching frequenc ...
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... • Note: If a resistance is connected in parallel with RD then the circuit is damped and the Q is lowered - used to shape the response of tuned circuits in amplifiers. Chelmsford Amateur Radio Society Advanced Licence Course ...
AN-EVAL3AR2280JZ
AN-EVAL3AR2280JZ

... the error amplifier and a driver stage. Compensation network C26, C27, R23, R24, R25, R26 and R27 constitutes the external circuitry of the error amplifier of IC21. This circuitry allows the feedback to be precisely matched to dynamically varying load conditions and provides stable control. The maxi ...
Practice use of the Digital Multimeter.
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... different components. It is essential that the DMM is set up to the correct mode and that the leads are in the correct sockets. Further more it is essential to ensure that there is no voltage present for resistance or diode tests and that the maximum voltage or current measurement limits are not exc ...
AD1671 Complete 12-Bit 1.25 MSPS Monolithic A/D Converter
AD1671 Complete 12-Bit 1.25 MSPS Monolithic A/D Converter

... system reliability and lower costs than hybrid designs. The fast settling input SHA is equally suited for both multiplexed systems that switch negative to positive full-scale voltage levels in successive channels and sampling inputs at frequencies up to and beyond the Nyquist rate. The AD1671 provid ...
ZXCT1023EV1 User Guide Issue 1
ZXCT1023EV1 User Guide Issue 1

AN1772
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... without the correct power supply voltage. Every microprocessor needs its power supply to be within a predefined range, to be able to function properly. A small glitch in the power supply can cause the system to crash. Incorrect power-up sequences, slow ramp-up and glitches on the supply lines are co ...
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Schmitt trigger



In electronics a Schmitt trigger is a comparator circuit with hysteresis implemented by applying positive feedback to the noninverting input of a comparator or differential amplifier. It is an active circuit which converts an analog input signal to a digital output signal. The circuit is named a ""trigger"" because the output retains its value until the input changes sufficiently to trigger a change. In the non-inverting configuration, when the input is higher than a chosen threshold, the output is high. When the input is below a different (lower) chosen threshold the output is low, and when the input is between the two levels the output retains its value. This dual threshold action is called hysteresis and implies that the Schmitt trigger possesses memory and can act as a bistable multivibrator (latch or flip-flop). There is a close relation between the two kinds of circuits: a Schmitt trigger can be converted into a latch and a latch can be converted into a Schmitt trigger.Schmitt trigger devices are typically used in signal conditioning applications to remove noise from signals used in digital circuits, particularly mechanical contact bounce. They are also used in closed loop negative feedback configurations to implement relaxation oscillators, used in function generators and switching power supplies.
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