Automatic 9V Battery Charger»Automatic 9V battery charger
... a triangle wave and a comparator. Pspice does not have a triangle wave generator/source, but a triangle wave can be achieved with a square wave generator with long rise and fall times. The comparator is achieved by the use of an operational amplifier and the TABLE function in Pspice. As the output o ...
... a triangle wave and a comparator. Pspice does not have a triangle wave generator/source, but a triangle wave can be achieved with a square wave generator with long rise and fall times. The comparator is achieved by the use of an operational amplifier and the TABLE function in Pspice. As the output o ...
Measurement of Bulk Resistance of Conducting Polymer Films in
... The metal conducting polymer contact has been studied by some workers in reference to making devices such as FET, LED where, the contact resistance is very large or comparable to the device resistance [10]. The interface is invariably forward biased and the contact resistance affects the device curr ...
... The metal conducting polymer contact has been studied by some workers in reference to making devices such as FET, LED where, the contact resistance is very large or comparable to the device resistance [10]. The interface is invariably forward biased and the contact resistance affects the device curr ...
May 2001 1MW Transimpedance Amplifier Achieves Near-Theoretical Noise Performance, 2.4GHz Gain Bandwidth, with Large-Area Photodiodes
... sampling. Note that R3–R6 must be low TC resistors if gain stability is required. If the bridge has temperature characteristics that are more significant than the temperature coefficient of the resistive elements themselves, the effective value of R1 can be modified with a thermistor or, if the temp ...
... sampling. Note that R3–R6 must be low TC resistors if gain stability is required. If the bridge has temperature characteristics that are more significant than the temperature coefficient of the resistive elements themselves, the effective value of R1 can be modified with a thermistor or, if the temp ...
Document
... Third, we examined the properties of an ideal transformer and determined that the ratio of the induced emf in the secondary coil to that of the generator was just equal to the ratio of the number of turns in secondary to the number of turns in the primary. We also determined that when a resistive lo ...
... Third, we examined the properties of an ideal transformer and determined that the ratio of the induced emf in the secondary coil to that of the generator was just equal to the ratio of the number of turns in secondary to the number of turns in the primary. We also determined that when a resistive lo ...
talk
... For each slice in time, sweep voltage to get CDF Use PDF to acquire mean voltage 30mVp-p ~ 3σ Æaverage down to σ ~10’s uV Resolution limited by external reference ESSCIRC 2009 ...
... For each slice in time, sweep voltage to get CDF Use PDF to acquire mean voltage 30mVp-p ~ 3σ Æaverage down to σ ~10’s uV Resolution limited by external reference ESSCIRC 2009 ...
Ferroelectrics in microwave technology
... papers with RF/microwave device or circuit demonstrations, and papers that address existing limitations of the technology with respect to RF losses, measurements, and circuit performance. Purely theoretical papers, or papers discussing only the materials, deposition methods, or low-frequency propert ...
... papers with RF/microwave device or circuit demonstrations, and papers that address existing limitations of the technology with respect to RF losses, measurements, and circuit performance. Purely theoretical papers, or papers discussing only the materials, deposition methods, or low-frequency propert ...
LM193JAN Low Power Low Offset Voltage Dual
... Reducing the input resistors to < 10 kΩ reduces the feedback signal levels and finally, adding even a small amount (1.0 to 10 mV) of positive feedback (hysteresis) causes such a rapid transition that oscillations due to stray feedback are not possible. Simply socketing the IC and attaching resistors ...
... Reducing the input resistors to < 10 kΩ reduces the feedback signal levels and finally, adding even a small amount (1.0 to 10 mV) of positive feedback (hysteresis) causes such a rapid transition that oscillations due to stray feedback are not possible. Simply socketing the IC and attaching resistors ...
Development Board EPC9006C - Rev. 3.0 Quick Start Guide
... required value (do not exceed the absolute maximum voltage of 100 V on VOUT) and probe switching node to see switching operation. 8. Once operational, adjust the bus voltage and load PWM control within the operating range and observe the output switching behavior, efficiency and other par ...
... required value (do not exceed the absolute maximum voltage of 100 V on VOUT) and probe switching node to see switching operation. 8. Once operational, adjust the bus voltage and load PWM control within the operating range and observe the output switching behavior, efficiency and other par ...
開啟檔案
... 1.解決以前只能控制high or low duty的情況。 2.不需要使用任何hall or position sensor=用未激磁相量測到 的端電壓來計算反電動勢的零交越點，產生正確的換相控制。 3.容易使用數位系統來實現=使用FPGA架構來實現BLDC Driver System。 ...
... 1.解決以前只能控制high or low duty的情況。 2.不需要使用任何hall or position sensor=用未激磁相量測到 的端電壓來計算反電動勢的零交越點，產生正確的換相控制。 3.容易使用數位系統來實現=使用FPGA架構來實現BLDC Driver System。 ...
Evaluates: MAX16803 MAX16803 Evaluation Kit General Description Features
... 5) Connect a 350mA-rated LED between LED+ and LED-. 6) Turn on the power supply and increase the input voltage above 6.5V. The LED glows with full brightness. Measure the LED current, and it shows 150mA ±3.5%. 7) Increase the supply voltage to 16V and the LED current will be stable. Measure the LED ...
... 5) Connect a 350mA-rated LED between LED+ and LED-. 6) Turn on the power supply and increase the input voltage above 6.5V. The LED glows with full brightness. Measure the LED current, and it shows 150mA ±3.5%. 7) Increase the supply voltage to 16V and the LED current will be stable. Measure the LED ...
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.