LDO design solves load transient problems
... power consumption and accurate operation. As the digital circuit—which is supplied from the LDO output—switches from one mode of operation to another, the load demand on the LDO can change quickly. This quick change of load results in a temporary glitch of the LDO output voltage. But digital circuit ...
... power consumption and accurate operation. As the digital circuit—which is supplied from the LDO output—switches from one mode of operation to another, the load demand on the LDO can change quickly. This quick change of load results in a temporary glitch of the LDO output voltage. But digital circuit ...
LTC4078
... The LTC4078X features a maximum 22V rating for both wall adapter and USB inputs, although charging stops if the selected power source exceeds the overvoltage limit. Internal thermal feedback regulates the battery charge current to maintain a constant die temperature during high power operation or hi ...
... The LTC4078X features a maximum 22V rating for both wall adapter and USB inputs, although charging stops if the selected power source exceeds the overvoltage limit. Internal thermal feedback regulates the battery charge current to maintain a constant die temperature during high power operation or hi ...
RF2173 0
... Notes about testing the RF2173 The test setup shown above includes two attenuators. The 3dB pad at the input is to minimize the effects that the switching of the input impedance of the PA has on the signal generator. When VAPC is switched quickly, the resulting input impedance change can cause the s ...
... Notes about testing the RF2173 The test setup shown above includes two attenuators. The 3dB pad at the input is to minimize the effects that the switching of the input impedance of the PA has on the signal generator. When VAPC is switched quickly, the resulting input impedance change can cause the s ...
PDF file, 712KB - College of Engineering and Computer Science
... Norwood, MA) current feedback amplifier according to the method proposed by Bragos et al (1994) with a peak value of 140 µA. The reference resistor RS, which is connected to electrode Lc in the excitation loop (figure 3), provides a reference voltage proportional to the current source I0. RS must be ...
... Norwood, MA) current feedback amplifier according to the method proposed by Bragos et al (1994) with a peak value of 140 µA. The reference resistor RS, which is connected to electrode Lc in the excitation loop (figure 3), provides a reference voltage proportional to the current source I0. RS must be ...
RHRG5060_F085 50A, 600V Hyperfast Rectifier RHRG5060_F085 50A, 600V Features
... RHRG5060_F085 50A, 600V Hyperfast Rectifier ...
... RHRG5060_F085 50A, 600V Hyperfast Rectifier ...
Chapter 21 AC Circuits
... An RC circuit is a common circuit used in electronic filters The basic idea is it take time to charge a capacitor thru a resistor Recall that a capacitor C with Voltage V across it has charge Q=CV Current I= dQ/dt = C dV/dt In a circuit with a capacitor and resistor in parallel the voltage across th ...
... An RC circuit is a common circuit used in electronic filters The basic idea is it take time to charge a capacitor thru a resistor Recall that a capacitor C with Voltage V across it has charge Q=CV Current I= dQ/dt = C dV/dt In a circuit with a capacitor and resistor in parallel the voltage across th ...
Universal Input Dual Lamp Ballast Parallel Configuration
... we do not need to sense the AC line. We also need only a single VCC supply because the PFC and ballast control are integrated on one IC. These features allow for a very reduced component count and a simplified PCB layout. The off time is determined from the inductor current detected at the ZX pin. T ...
... we do not need to sense the AC line. We also need only a single VCC supply because the PFC and ballast control are integrated on one IC. These features allow for a very reduced component count and a simplified PCB layout. The off time is determined from the inductor current detected at the ZX pin. T ...
Stability and dynamic performance of current
... output and by injecting the excitation signal at the output of amplifier UA2. It can be shown that the CS loop gain of two nonidentical modules is equal to the sum of these two measured loop gains. In practice, however, parameters of the CS loops of paralleled VRMs are tightly matched, since their m ...
... output and by injecting the excitation signal at the output of amplifier UA2. It can be shown that the CS loop gain of two nonidentical modules is equal to the sum of these two measured loop gains. In practice, however, parameters of the CS loops of paralleled VRMs are tightly matched, since their m ...
Electronic components
... Its capacitance value can be varied by rotating a shaft. It consists of metal plates separated from each other by air, one set of plate is stationary and called stator and the other set is known as rotor. One knob is fitted to the shaft a variable capacitor to rotate it. On rotation of the shaft the ...
... Its capacitance value can be varied by rotating a shaft. It consists of metal plates separated from each other by air, one set of plate is stationary and called stator and the other set is known as rotor. One knob is fitted to the shaft a variable capacitor to rotate it. On rotation of the shaft the ...
P2410200 Wheatstone Bridge
... Set-up and procedure In advance, up to five randomly selected resistors must be prepared for the measurement. To hide the resistance information, the printed values and optionally the transparent case of the chosen resistors have to be covered with adhesive tape. For separation during the measuremen ...
... Set-up and procedure In advance, up to five randomly selected resistors must be prepared for the measurement. To hide the resistance information, the printed values and optionally the transparent case of the chosen resistors have to be covered with adhesive tape. For separation during the measuremen ...
Lab 2
... The magnetizing elements, Lm and Rm, are due to the current drawn by the transformer without a load connected to the secondary. The magnetizing inductance draws the current that is necessary to sustain the magnetic field in the core. The magnetizing resistance models the losses due to currents induc ...
... The magnetizing elements, Lm and Rm, are due to the current drawn by the transformer without a load connected to the secondary. The magnetizing inductance draws the current that is necessary to sustain the magnetic field in the core. The magnetizing resistance models the losses due to currents induc ...
MAX1739/MAX1839 Wide Brightness Range CCFL Backlight Controllers General Description
... MAX1839 optimize this architecture to work over a wide input voltage range, achieve high efficiency, and maximize the dimming range. The MAX1739/MAX1839 monitor and limit the transformer center-tap voltage when required. This ensures minimal voltage stress on the transformer, which increases the ope ...
... MAX1839 optimize this architecture to work over a wide input voltage range, achieve high efficiency, and maximize the dimming range. The MAX1739/MAX1839 monitor and limit the transformer center-tap voltage when required. This ensures minimal voltage stress on the transformer, which increases the ope ...
TSOP582.., TSOP584..
... frequency, burst length, and envelope duty cycle. The data signal should be close to the device’s band-pass center frequency (e.g. 38 kHz) and fulfill the conditions in the table below. When a data signal is applied to the product in the presence of a disturbance, the sensitivity of the receiver is ...
... frequency, burst length, and envelope duty cycle. The data signal should be close to the device’s band-pass center frequency (e.g. 38 kHz) and fulfill the conditions in the table below. When a data signal is applied to the product in the presence of a disturbance, the sensitivity of the receiver is ...
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.