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AAT3242 数据资料DataSheet下载
AAT3242 数据资料DataSheet下载

... The AAT3242 is a dual low dropout linear regulator with Power OK (POK) outputs. Two integrated regulators provide a high power 300mA output and a lower power 150mA output, making this device ideal for use with microprocessors and DSP cores in portable products. Two POK pins provide open drain output ...
Capacitor and inductors
Capacitor and inductors

ENHANCING FUEL BURNING EFFICIENCY BY REGULATE SPARK
ENHANCING FUEL BURNING EFFICIENCY BY REGULATE SPARK

... modelling using simulink software to assess the effectiveness of the model and its transient behaviour [8]. In [9], the piezoelectric actuator, there is a new technology in automotive system, where it is high performances, low emission and less fuel consumption. Piezoelectric actuators require a hig ...
General Description Features
General Description Features

... design supplies load currents up to 150A for low-voltage CPU core power requirements. A tri-state SEL input is available to configure the VID logic for either the Intel VRD11/VRD10 or AMD K8 Rev F applications. An enable input (EN) is available to disable the IC. True-differential remote output-volt ...
Introduction to Fundamental Crystal Oscillators
Introduction to Fundamental Crystal Oscillators

... This capacitance is not related to any capacitance present in the crystals or the circuit but refers to the load capacitance used when crystals are measured in standard test sets. The preferred value of capacitance is 30 pF but crystals can be manufactured for other values. These circuits are design ...
Electricity Lab NV6000 Operating Manual Ver 1.1 141
Electricity Lab NV6000 Operating Manual Ver 1.1 141

... means that for high value of resistance a high voltage drop will be there and for a low value resistance low voltage drop will be there. In any parallel circuit the voltage is the same across all the elements of parallel combination. It means parallel resistances represent a single resistance and th ...
MAX1700/MAX1701 1-Cell to 3-Cell, High-Power (1A), Low-Noise, Step-Up DC-DC Converters General Description
MAX1700/MAX1701 1-Cell to 3-Cell, High-Power (1A), Low-Noise, Step-Up DC-DC Converters General Description

... maximum battery life during standby and shutdown modes. They feature constant-frequency (300kHz), lownoise PWM operation with up to 800mA output capability. See Table 1 for typical available output current. A low-quiescent-current, low-power mode offers an output up to 100mA and reduces quiescent po ...
Example Generic Electrical Procedure Manual
Example Generic Electrical Procedure Manual

... 2.1.9. Note 5: Errors due self-heating and voltage coefficients Measuring resistors at high power levels (above 0.5 watts) will cause the resistor to heat up, due to the temperature co-efficient of the resistor the value will change. As the temperature rise reaches an equilibrium the value of resist ...
Basic Circuit Elements - New Age International
Basic Circuit Elements - New Age International

This work shows the possibility of using a low-cost 130
This work shows the possibility of using a low-cost 130

... wireless communications has put into focus the future need for low-cost and miniature fully integrated systems that enable the transfer of gigabits-per-second data reliably over a certain distance [1]. The exploitation of mm-wave frequencies for high data rate transfer is a natural step due to the i ...
Human body model and ESD
Human body model and ESD

A Fast, Cheap, High-Entropy Source for IoT Devices
A Fast, Cheap, High-Entropy Source for IoT Devices

... - “All three boards should produce log2(1.82) = 0.864 bits of entropy per bit by design” -Entropy calculated based on loop gain of the system, amplifies resistor RMS noise voltage ...
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Homework Set 3

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Journal of Environmental Science, Computer Science and

... Abstract: The speed control scheme of DC motor and provides a comparative analysis of firing angle based speed control technique. The best control characteristics of DC motor have used in industries for different rang of loading condition. A dual converter comprised of two single phase AC-DC thyrist ...
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Evaluates: MAX1848 MAX1848 Evaluation Kit General Description Features

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LPF-8 manual - Warner Instruments
LPF-8 manual - Warner Instruments

... Two Inputs are provided on the LPF-8 front panel. The + and - Inputs can be used individually (single-ended) or differentially. When used single-ended, a positive signal on the + Input will give a positive signal at the output. Likewise, a negative signal on the - Input will give a positive signal a ...
dc generator - 123SeminarsOnly.com
dc generator - 123SeminarsOnly.com

... with the armature and naturally to be designed for rated armature current. Obviously there will be practically no voltage or very small voltage due to residual field under no load condition (Ia=0). However, field gets strengthened as load will develop rated voltage across the armature with reverse p ...
ZXGD3103EV1 User Guide Issue 2
ZXGD3103EV1 User Guide Issue 2

... MOSFET in a high-side-configuration (see Fig. 3a), as the board can be floated to any potential. In practice, the supply voltage could be derived from an auxiliary supply winding across the transformer secondary. If the board is used for comparison against an existing synchronous rectification solut ...
Optimizing the Heathkit HW-101, SB100-102 Transceivers
Optimizing the Heathkit HW-101, SB100-102 Transceivers

... During alignment check to see if, while adjusting T-102 (Figure 3), there are two points where the transformer can be peaked -- one spot for transmit and a slightly different setting for receive. If so, peak the transformer for maximum transmit drive instead of maximum receive gain. The receiver has ...
(b) a
(b) a

... Linear circuit with all independent sources set equal to zero ...
45 An OR Operation In this example an OR operation is used in
45 An OR Operation In this example an OR operation is used in

... A normally open Start pushbutton is wired to the first input (I0.0), a normally closed Stop pushbutton is wired to the second input (I0.1), and normally closed overload relay contacts (part of the motor starter) are connected to the third input (I0.2). The first input (I0.0), second input (I0.1), an ...
LTC3250-1.5/LTC3250-1.2 - High Efficiency, Low Noise
LTC3250-1.5/LTC3250-1.2 - High Efficiency, Low Noise

... (see “Ceramic Capacitor Selection Guidelines” section). If only 100mA or less of output current is required for the application the flying capacitor minimum can be reduced to 0.15µF. Ceramic Capacitor Selection Guidelines Capacitors of different materials lose their capacitance with higher temperatu ...
RF5765 2.4GHz to 2.5GHz 802.11b/g/n WiFi FRONT-END MODULE Features
RF5765 2.4GHz to 2.5GHz 802.11b/g/n WiFi FRONT-END MODULE Features

... return loss at the RX output. For best performance and trade off between critical parameters such as NF, Gain, and IP3, the total inductance including board trace should be approximately 1.2nH. The 5.6kΩ series resistor for the Bluetooth® control line helps to prevent unwanted signal from coupling t ...
AD534 (Rev. D) - Analog Devices
AD534 (Rev. D) - Analog Devices

C-Bus Network Voltage Calculations
C-Bus Network Voltage Calculations

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Resistive opto-isolator



Resistive opto-isolator (RO), also called photoresistive opto-isolator, vactrol (after a genericized trademark introduced by Vactec, Inc. in the 1960s), analog opto-isolator or lamp-coupled photocell, is an optoelectronic device consisting of a source and detector of light, which are optically coupled and electrically isolated from each other. The light source is usually a light-emitting diode (LED), a miniature incandescent lamp, or sometimes a neon lamp, whereas the detector is a semiconductor-based photoresistor made of cadmium selenide (CdSe) or cadmium sulfide (CdS). The source and detector are coupled through a transparent glue or through the air.Electrically, RO is a resistance controlled by the current flowing through the light source. In the dark state, the resistance typically exceeds a few MOhm; when illuminated, it decreases as the inverse of the light intensity. In contrast to the photodiode and phototransistor, the photoresistor can operate in both the AC and DC circuits and have a voltage of several hundred volts across it. The harmonic distortions of the output current by the RO are typically within 0.1% at voltages below 0.5 V.RO is the first and the slowest opto-isolator: its switching time exceeds 1 ms, and for the lamp-based models can reach hundreds of milliseconds. Parasitic capacitance limits the frequency range of the photoresistor by ultrasonic frequencies. Cadmium-based photoresistors exhibit a ""memory effect"": their resistance depends on the illumination history; it also drifts during the illumination and stabilizes within hours, or even weeks for high-sensitivity models. Heating induces irreversible degradation of ROs, whereas cooling to below −25 °C dramatically increases the response time. Therefore, ROs were mostly replaced in the 1970s by the faster and more stable photodiodes and photoresistors. ROs are still used in some sound equipment, guitar amplifiers and analog synthesizers owing to their good electrical isolation, low signal distortion and ease of circuit design.
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