series and parallel - crypt
... only accept if ‘smaller than’ is given accept converse accept a correct calculation accept resistance is half of 60 accept resistance = 30 (Ω) do not accept answers in terms of p.d ...
... only accept if ‘smaller than’ is given accept converse accept a correct calculation accept resistance is half of 60 accept resistance = 30 (Ω) do not accept answers in terms of p.d ...
There is a new light source that is all the buzz in lighting
... There is a new light source that is "all the buzz" in lighting circles - the light emitting diode - better known as an LED. Actually, it is not at all that new. The phenomenon of electroluminescence in a piece of silicon was first observed in 1907; however, it was not until the 1960’s that the first ...
... There is a new light source that is "all the buzz" in lighting circles - the light emitting diode - better known as an LED. Actually, it is not at all that new. The phenomenon of electroluminescence in a piece of silicon was first observed in 1907; however, it was not until the 1960’s that the first ...
AM Receiver - Profe Saul
... around 3 inches. The variable capacitor tuned 0 - 300 pF but there is plenty of scope for experiment here. One final point, you will need an external antenna to receive broadcasts. I have an ...
... around 3 inches. The variable capacitor tuned 0 - 300 pF but there is plenty of scope for experiment here. One final point, you will need an external antenna to receive broadcasts. I have an ...
Low-Voltage (1.2-V) High-Efficiency
... their products and applications using TI components. To minimize the risks associated with customer products and applications, customers should provide adequate design and operating safeguards. TI does not warrant or represent that any license, either express or implied, is granted under any TI pate ...
... their products and applications using TI components. To minimize the risks associated with customer products and applications, customers should provide adequate design and operating safeguards. TI does not warrant or represent that any license, either express or implied, is granted under any TI pate ...
OPA381, OPA2381: Precision, Low Power, 18MHz Transimpedance
... The signal bandwidth of a transimpedance amplifier depends largely on the GBW of the amplifier and the parasitic capacitance of the photodiode, as well as the feedback resistor. The 18MHz GBW of the OPA381 enables a transimpedance bandwidth of > 250kHz in most configurations. The OPA381 is ideally s ...
... The signal bandwidth of a transimpedance amplifier depends largely on the GBW of the amplifier and the parasitic capacitance of the photodiode, as well as the feedback resistor. The 18MHz GBW of the OPA381 enables a transimpedance bandwidth of > 250kHz in most configurations. The OPA381 is ideally s ...
ES636 True RMS-to-DC Converters Features
... current it draws at this mode is less than 1uA. Choosing the Averaging Time Constant The ES636 computes the RMS value of AC andd DC signals. At low frequencies and DC, the output tracks the input exactly; at higher frequencies, the average output approaches the RMS value of the input signal. The act ...
... current it draws at this mode is less than 1uA. Choosing the Averaging Time Constant The ES636 computes the RMS value of AC andd DC signals. At low frequencies and DC, the output tracks the input exactly; at higher frequencies, the average output approaches the RMS value of the input signal. The act ...
Towards a Portuguese participation in the European Spallation
... -Semiconductor switches and drivers are of standard commercial types (multisource); -HF transformers operate in AC mode. No intrinsic limitations exist on the pulse length; -Flat-top voltage (droop) is regulated in closed loop; -Intrinsic voltage shut-down in case of klystron arcing (De-Qing); -Modu ...
... -Semiconductor switches and drivers are of standard commercial types (multisource); -HF transformers operate in AC mode. No intrinsic limitations exist on the pulse length; -Flat-top voltage (droop) is regulated in closed loop; -Intrinsic voltage shut-down in case of klystron arcing (De-Qing); -Modu ...
AUTOMOTIVE CHARGING SYSTEMS
... AROUND A IRON CORE CURRENT PASSING THROUGH ROTOR CREATES A MAGNETIC FIELD MAGNETIC FIELDS PRODUCE A VOLTAGE BY INDUCTION IN STATOR WINDINGS ...
... AROUND A IRON CORE CURRENT PASSING THROUGH ROTOR CREATES A MAGNETIC FIELD MAGNETIC FIELDS PRODUCE A VOLTAGE BY INDUCTION IN STATOR WINDINGS ...
OPA341 OPA2341 SINGLE-SUPPLY, RAIL-TO-RAIL OPERATIONAL AMPLIFIER WITH SHUTDOWN
... more than 300mV can cause excessive current to flow in or out of the input pins. Momentary voltages greater than 300mV beyond the power supply can be tolerated if the current on the input pins is limited to 10mA. This is easily accomplished with an input resistor, as shown in Figure 3. Many input si ...
... more than 300mV can cause excessive current to flow in or out of the input pins. Momentary voltages greater than 300mV beyond the power supply can be tolerated if the current on the input pins is limited to 10mA. This is easily accomplished with an input resistor, as shown in Figure 3. Many input si ...
UC2853 数据资料 dataSheet 下载
... ICOMP: Current Loop Error Amplifier Output. The current loop error amplifier is a conventional operational amplifier with a 150µA current source class A output stage. Compensate the current loop by placing an impedance between ICOMP and IMO. This output can swing above the oscillator peak voltage, a ...
... ICOMP: Current Loop Error Amplifier Output. The current loop error amplifier is a conventional operational amplifier with a 150µA current source class A output stage. Compensate the current loop by placing an impedance between ICOMP and IMO. This output can swing above the oscillator peak voltage, a ...
MAX8640Y/MAX8640Z Tiny 500mA, 4MHz/2MHz Synchronous Step-Down DC-DC Converters General Description
... switching frequency for high efficiency with small external components and maintains low output ripple voltage at all loads. The MAX8640Z switches at up to 4MHz to allow a tiny 1µH inductor and 2.2µF output capacitor. The MAX8640Y switches at up to 2MHz for higher efficiency while still allowing sma ...
... switching frequency for high efficiency with small external components and maintains low output ripple voltage at all loads. The MAX8640Z switches at up to 4MHz to allow a tiny 1µH inductor and 2.2µF output capacitor. The MAX8640Y switches at up to 2MHz for higher efficiency while still allowing sma ...
Experiment 6: Rectifiers
... possible using the known conventional techniques. Thus, the scope has to be set up to function in differential mode. A consequence of this set up is that you will only be able to use the scope to measure one waveform, which in this case will be the output of the circuits. Therefore make sure you hav ...
... possible using the known conventional techniques. Thus, the scope has to be set up to function in differential mode. A consequence of this set up is that you will only be able to use the scope to measure one waveform, which in this case will be the output of the circuits. Therefore make sure you hav ...
Author - Princeton ISD
... By convention, electric current is the direction in which a positive test charge moves. An electrical circuit transforms electrical energy into thermal or mechanical energy. Resistors can be combined in different ways to make a series or parallel circuit. In a series circuit, the charge travels alon ...
... By convention, electric current is the direction in which a positive test charge moves. An electrical circuit transforms electrical energy into thermal or mechanical energy. Resistors can be combined in different ways to make a series or parallel circuit. In a series circuit, the charge travels alon ...
Test Equipment for AC/DC Drive and Power Electronic Measurement
... SCR DC Drives but may not be adequate for today’s PWM AC Drives. Isolated voltage probes provide another alternative to safe voltage measurements. As the name implies, isolated voltage probes have no direct connection between the measurement probes and the inputs to the scope. The means of isolation ...
... SCR DC Drives but may not be adequate for today’s PWM AC Drives. Isolated voltage probes provide another alternative to safe voltage measurements. As the name implies, isolated voltage probes have no direct connection between the measurement probes and the inputs to the scope. The means of isolation ...
LF155/LF156/LF157 Series Monolithic JFET Input Operational Amplifiers LF155/LF156/LF157 General Description
... Note 4: The Temperature Coefficient of the adjusted input offset voltage changes only a small amount (0.5mV/§ C typically) for each mV of adjustment from its original unadjusted value. Common-mode rejection and open loop voltage gain are also unaffected by offset adjustment. Note 5: The input bias c ...
... Note 4: The Temperature Coefficient of the adjusted input offset voltage changes only a small amount (0.5mV/§ C typically) for each mV of adjustment from its original unadjusted value. Common-mode rejection and open loop voltage gain are also unaffected by offset adjustment. Note 5: The input bias c ...
LOGO!Power 12
... Startup delay/ voltage rise Rated current Iout rated Current range to +55 °C Parallel switching for enhanced performance ...
... Startup delay/ voltage rise Rated current Iout rated Current range to +55 °C Parallel switching for enhanced performance ...
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.