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AD9752 数据手册DataSheet 下载
AD9752 数据手册DataSheet 下载

... The on-chip reference and control amplifier are configured for maximum accuracy and flexibility. The AD9752 can be driven by the on-chip reference or by a variety of external reference voltages. The internal control amplifier, which provides a wide (>10:1) adjustment span, allows the AD9752 full-sca ...
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... *1: The same numbers cannot be used with the timer counter. TD is 0 to 255. *2: Only timers numbered 0 to 63 can use 0.01s for their timer base. ...
LMC6482 - UTK-EECS
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... algorithms compare the last sampled voltage and current versus the presently sampled voltage and current to see which state will produce the maximum power [11]. Additionally, the literature offers other types of MPPT algorithms such that ...
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TPS60230 数据资料 dataSheet 下载
TPS60230 数据资料 dataSheet 下载

... The enable pins EN1 and EN2 are used to enable the device or set it into shutdown. The TPS60230 is enabled if one of the enable pins is pulled higher than the enable trip point of 1.3 V. The device starts up by going through the soft start routine as described in the section Soft Start. Pulling both ...
Half bridge converter DC balance with current signal
Half bridge converter DC balance with current signal

Amplitude-Modulation Characteristics of Power
Amplitude-Modulation Characteristics of Power

... 1(a). The optimum Class-E load resistance R [16] is transformed into the system impedance (Rα which is typically 50 Ω) by the λ/4 lines. The λ/4 lines in Fig. 1(a) are then replaced by the equivalent hybrid Π-circuits comprised of a transmission line with characteristic impedance Z01 and electrical ...
BDTIC
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... can be adjusted with an external sense resistor. The IC is a step down converter tailored to drive the 1W LEDs. According to the multifunctional control pin the IC can be switched on and off by an external signal, which is also suitable to regulate brightness of the LEDs by PWM or analog dimming. Th ...
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... with the 1 kHz signal determined in step 1, perform an FFT Spectrum Analysis with Hann Windowing over the frequency range of 100 Hz to 8500 Hz, averaged over a period of 5 seconds. b) Apply the Half-Band Integrator correction curve to the summable spectrum from the above FFT measurement (see Error! ...
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... The only controlled copy of this Data Sheet is the electronic read-only version located on the Cooper Bussmann Network Drive. All other copies of this document are by definition uncontrolled. This bulletin is intended to clearly present comprehensive product data and provide technical information th ...
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... gate, the top 20 MΩ resistor may be replaced by a pnp-IBJT (Fig. 3b). In such complementary inverter the npn-IBJT is nonconductive for a high input while the pnp-IBJT is nonconductive for a low input signal. Together this minimizes the power consumption of the NOT gate and improves its output swing ...
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... terminal of the battery, pulling electrons out of that end, or you could say that positive charges from the ’+’ end of the battery flow through the wire to the minus end of the wire. In other words the electric field in the wire causes the mobile charge to move. As we will see soon, this moving char ...
Conference Paper - UCF EECS - University of Central Florida
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... If hFE for the transistor is 500, determine the base current required to switch on the bulb. What voltage is required at the base of the transistor to ensure that the bulb indicator switches ON? Calculate the voltage dropped over, and hence the current through the 10 k resistor. Calculate the curren ...
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... completely automated and it has controlled battery charger, which provides maintaining of battery in stand-by condition. It has electronic protection from overloading, automatic circuit breaker in DC area and fuse in AC area, and appropriate display of mode. Due to a high quality of output signal, w ...
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... voltage is unbalanced. If the voltage unbalance should be extremely severe, the torques might not be adequate for the application. The torque may still be adequate on variable torque applications, such as pumps and fans. However, on constant torque applications, such as conveyers, there can be accel ...
lecture09
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... • Envelope of s(t) has about same shape as m(t) if | ka m(t) | < 1 for all t fc >> W where W is bandwidth of m(t) ...
< 1 ... 972 973 974 975 976 977 978 979 980 ... 2207 >

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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