4.1 LCD Basics
... single polarization to pass through. 4.1.2 Twisted nematic effect in liquid crystals The development of the twisted nematic effect changed liquid crystals from an interesting material to the commercially viable display technology that has virtually replaced all other approaches. The strength of this ...
... single polarization to pass through. 4.1.2 Twisted nematic effect in liquid crystals The development of the twisted nematic effect changed liquid crystals from an interesting material to the commercially viable display technology that has virtually replaced all other approaches. The strength of this ...
STM1831
... Capacitor CD determines the delay (tCD) between reset deassertion and the moment when VSEN voltage exceeds the VDET threshold (see Figure 5 with calculations for more details). Any external leakage due to poor quality timing capacitors or excessive humidity may cause a significant leakage current wh ...
... Capacitor CD determines the delay (tCD) between reset deassertion and the moment when VSEN voltage exceeds the VDET threshold (see Figure 5 with calculations for more details). Any external leakage due to poor quality timing capacitors or excessive humidity may cause a significant leakage current wh ...
FPF2148 Full Function Load Switch
... Counterfeiting of semiconductor parts is a growing problem in the industry. All manufactures of semiconductor products are experiencing counterfeiting of their parts. Customers who inadvertently purchase counterfeit parts experience many problems such as loss of brand reputation, substandard perform ...
... Counterfeiting of semiconductor parts is a growing problem in the industry. All manufactures of semiconductor products are experiencing counterfeiting of their parts. Customers who inadvertently purchase counterfeit parts experience many problems such as loss of brand reputation, substandard perform ...
MAX13253 1A, Spread-Spectrum, Push-Pull, Transformer Driver for Isolated Power Supplies General Description
... and operates from a single +3.0V to +5.5V supply. The transformer’s secondary-to-primary winding ratio defines the output voltage, allowing selection of virtually any isolated output voltage with galvanic isolation. The MAX13253 features an integrated oscillator driving a pair of n-channel power swi ...
... and operates from a single +3.0V to +5.5V supply. The transformer’s secondary-to-primary winding ratio defines the output voltage, allowing selection of virtually any isolated output voltage with galvanic isolation. The MAX13253 features an integrated oscillator driving a pair of n-channel power swi ...
TPS40020 数据资料 dataSheet 下载
... 690 mV. Using a top side N-channel MOSFET for the primary buck switch results in lower switch resistance for a given gate charge. The device controls the delays from main switch off to rectifier turn on and from rectifier turn off to main switch turn on in a way that minimizes diode losses (both con ...
... 690 mV. Using a top side N-channel MOSFET for the primary buck switch results in lower switch resistance for a given gate charge. The device controls the delays from main switch off to rectifier turn on and from rectifier turn off to main switch turn on in a way that minimizes diode losses (both con ...
AD8386 10-Bit, 12-Channel Output Decimating LCD Driver Data
... When TSW is LOW, the thermal protection circuit is disabled, and the output current limiter is turned on. The maximum current at any one output of the AD8386 is internally limited to 100 mA average. In the event of a momentary short circuit between a video output and a power supply rail (AVCC or AGN ...
... When TSW is LOW, the thermal protection circuit is disabled, and the output current limiter is turned on. The maximum current at any one output of the AD8386 is internally limited to 100 mA average. In the event of a momentary short circuit between a video output and a power supply rail (AVCC or AGN ...
Lab 3 - OHM`S LAW AND KIRCHHOFF`S CIRCUIT RULES
... current divides among the branches so that the total current through the battery equals the sum of the currents in each branch. You have also observed that when two or more parallel branches are connected directly across a battery, making a change in one branch does not affect the current in the oth ...
... current divides among the branches so that the total current through the battery equals the sum of the currents in each branch. You have also observed that when two or more parallel branches are connected directly across a battery, making a change in one branch does not affect the current in the oth ...
AD420 数据手册DataSheet 下载
... The AD420 has a loop fault detection circuit that warns if the voltage at IOUT attempts to rise above the compliance range, due to an open-loop circuit or insufficient power supply voltage. The FAULT DETECT is an active low open drain signal so that one can connect several AD420s together to one pul ...
... The AD420 has a loop fault detection circuit that warns if the voltage at IOUT attempts to rise above the compliance range, due to an open-loop circuit or insufficient power supply voltage. The FAULT DETECT is an active low open drain signal so that one can connect several AD420s together to one pul ...
PQM (Power Quality Meter) Features Introduction HC 6030
... ModBus protocol. If analog values are required for direct interface to a PLC, and of the monitored values can be output to one of 4 isolated analog outputs and 2 pulse outputs. Process variables can be measured using 3 analog inputs. Other plant personnel can connect a front panel RS232 communicatio ...
... ModBus protocol. If analog values are required for direct interface to a PLC, and of the monitored values can be output to one of 4 isolated analog outputs and 2 pulse outputs. Process variables can be measured using 3 analog inputs. Other plant personnel can connect a front panel RS232 communicatio ...
Neutral Grounding
... of energy and not exceed the temperature limitations of IEEE Standard 32-1972. As defined in this publication, the time and temperature ratings for neutral grounding resistors are as follows: Short time: Short time ratings are 10 and 60 seconds. Since short time rated resistors can only withstand ra ...
... of energy and not exceed the temperature limitations of IEEE Standard 32-1972. As defined in this publication, the time and temperature ratings for neutral grounding resistors are as follows: Short time: Short time ratings are 10 and 60 seconds. Since short time rated resistors can only withstand ra ...
medium-voltage measuring current transformers user
... Before carrying out any operation, make sure that the CTs are not connected to the power grid or powered in any way. Check the tightening of the primary and secondary connections. Ensure that the insulating resin surface shows no signs of deterioration such as carbonisation or ...
... Before carrying out any operation, make sure that the CTs are not connected to the power grid or powered in any way. Check the tightening of the primary and secondary connections. Ensure that the insulating resin surface shows no signs of deterioration such as carbonisation or ...
stepper motor drive considerations, common
... current losses. The latter group of parasitic losses generally increases with increased ripple currents and frequency. Chopping techniques that have a high ripple current will have higher losses in the motor. Enable or two phase chopping will cause higher losses in the motor with the effect of raisi ...
... current losses. The latter group of parasitic losses generally increases with increased ripple currents and frequency. Chopping techniques that have a high ripple current will have higher losses in the motor. Enable or two phase chopping will cause higher losses in the motor with the effect of raisi ...
How batteries discharge: A simple model
... The unnatural spatial separation of the voltages associated with this incorrect model of the emf and the internal resistance is necessary in order to distinguish these voltages, because in one dimension they both vary linearly with the spatial coordinate. A reasonably correct treatment of a discharg ...
... The unnatural spatial separation of the voltages associated with this incorrect model of the emf and the internal resistance is necessary in order to distinguish these voltages, because in one dimension they both vary linearly with the spatial coordinate. A reasonably correct treatment of a discharg ...
0.5 – 6 GHz Low Noise GaAs MMIC Amplifier Technical Data MGA-86563
... effect the noise figure. A small value resistor placed in series with the Vdd line may be useful to “de-Q” the bias circuit. Typical values of R1 are in the 10 Ω to 100 Ω range. Depending on the value of resistance used, the supply voltage may have to be increased to compensate for voltage drop acro ...
... effect the noise figure. A small value resistor placed in series with the Vdd line may be useful to “de-Q” the bias circuit. Typical values of R1 are in the 10 Ω to 100 Ω range. Depending on the value of resistance used, the supply voltage may have to be increased to compensate for voltage drop acro ...
Low Power High Speed Differential Current Comparator
... and simulated with Spectre. The frequency response of the differential amplifier is shown Fig. 5. The overall gain is found to be 28dB and bandwidth is 1.4 GHz. The phase cross over at 0dB is 75o. Fig. 6 shows the current inputs to the comparator and its computed voltage output at no-load condition. ...
... and simulated with Spectre. The frequency response of the differential amplifier is shown Fig. 5. The overall gain is found to be 28dB and bandwidth is 1.4 GHz. The phase cross over at 0dB is 75o. Fig. 6 shows the current inputs to the comparator and its computed voltage output at no-load condition. ...
Four-Phase Oscillators Employing Two Active Elements
... parameters of DO-CIBA No. 1 or 2 in Fig. 2. The final formulae are given in Tab. 2 in the columns OF (oscillation frequency), OC (oscillation condition) and OF+OC (oscillation frequency on the assumption of fulfilling the oscillation condition). Note that the simpler formulae in the OF+OC column can ...
... parameters of DO-CIBA No. 1 or 2 in Fig. 2. The final formulae are given in Tab. 2 in the columns OF (oscillation frequency), OC (oscillation condition) and OF+OC (oscillation frequency on the assumption of fulfilling the oscillation condition). Note that the simpler formulae in the OF+OC column can ...
ADA4310-1 数据手册DataSheet 下载
... Applications (that is, powerline AV modems) requiring greater than 10 dBm peak power should consider using an external line driver, such as the ADA4310-1. Figure 21 shows an example interface between the TxDAC® output and ADA4310-1 biased for single-supply operation. The TxDAC’s peak-to-peak differe ...
... Applications (that is, powerline AV modems) requiring greater than 10 dBm peak power should consider using an external line driver, such as the ADA4310-1. Figure 21 shows an example interface between the TxDAC® output and ADA4310-1 biased for single-supply operation. The TxDAC’s peak-to-peak differe ...
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.