Lecture-7: Modeling of Real World Systems
... • Speed control can be achieved using DC drives in a number of ways. • Variable Voltage can be applied to the armature terminals of the DC motor . • Another method is to vary the flux per pole of the motor. • The first method involve adjusting the motor’s armature while the latter method involves ad ...
... • Speed control can be achieved using DC drives in a number of ways. • Variable Voltage can be applied to the armature terminals of the DC motor . • Another method is to vary the flux per pole of the motor. • The first method involve adjusting the motor’s armature while the latter method involves ad ...
MAX2235 +3.6V, 1W Autoramping Power Amplifier for 900MHz Applications General Description
... thus extending the operating life of the battery. At +30dBm output power, efficiency is typically 47%. An additional power-saving feature is a shutdown mode that typically reduces supply current below 1µA. ...
... thus extending the operating life of the battery. At +30dBm output power, efficiency is typically 47%. An additional power-saving feature is a shutdown mode that typically reduces supply current below 1µA. ...
A Monotonic Digitally Programmable Delay Element for Low Power
... current starved inverters was proposed and shown in Figure 4. NMOS control transistors, Mn0, Mn1, Mn2,are connected to the source of M1 and PMOScontroltransistors,Mp0,Mp1,Mp2,…,are connected to the source of M2. By an input code, the rising/falling edge can be controlled accordingly. However, due to ...
... current starved inverters was proposed and shown in Figure 4. NMOS control transistors, Mn0, Mn1, Mn2,are connected to the source of M1 and PMOScontroltransistors,Mp0,Mp1,Mp2,…,are connected to the source of M2. By an input code, the rising/falling edge can be controlled accordingly. However, due to ...
Sample #1 - Edge - Rochester Institute of Technology
... The first was to multiplex or MUX the input, and then do the filtering and signal condition between the multiplex and the ADC. The second implementation idea was to filter the input and then multiplex the input signals directly to the ADC. Thirdly, the idea to use a micro controller to take the plac ...
... The first was to multiplex or MUX the input, and then do the filtering and signal condition between the multiplex and the ADC. The second implementation idea was to filter the input and then multiplex the input signals directly to the ADC. Thirdly, the idea to use a micro controller to take the plac ...
Implementing an Isolated 1-Wire Bus
... deployed in a new type of isolators that contains an RF transmitter and receiver in a small SOIC package. In the discussion below, for each technology, one major vendor was identified. Where possible, this article identifies a single- and a dual-channel device for 2.5kV isolation that is suitable fo ...
... deployed in a new type of isolators that contains an RF transmitter and receiver in a small SOIC package. In the discussion below, for each technology, one major vendor was identified. Where possible, this article identifies a single- and a dual-channel device for 2.5kV isolation that is suitable fo ...
OPA549 High-Voltage, High-Current OPERATIONAL AMPLIFIER DESCRIPTION
... status. Figure 3 shows an example implementing this function. This function not only conserves power during idle periods (quiescent current drops to approximately 6mA) but also allows multiplexing in multi-channel applications. See Figure 12 for two ...
... status. Figure 3 shows an example implementing this function. This function not only conserves power during idle periods (quiescent current drops to approximately 6mA) but also allows multiplexing in multi-channel applications. See Figure 12 for two ...
Lab 2: Oscilloscopes and Function Generators
... Measure the magnitudes of both voltages with both the oscilloscope and the multimeter. Determine the frequency of the voltages using the oscilloscope. Sketch the waveforms of Vin and V2, as seen on the oscilloscope. Note: it is not possible to directly measure or display a voltage like V1 in ...
... Measure the magnitudes of both voltages with both the oscilloscope and the multimeter. Determine the frequency of the voltages using the oscilloscope. Sketch the waveforms of Vin and V2, as seen on the oscilloscope. Note: it is not possible to directly measure or display a voltage like V1 in ...
FAN7930B Critical Conduction Mode PFC Controller FAN7930B — Criti c
... happens at light load and audible noise may be generated from the boost inductor or inductor at input filter. Different from the other converters, burst operation in PFC block is not needed because PFC block itself is normally disabled during standby mode. To improve this kind of unwanted burst oper ...
... happens at light load and audible noise may be generated from the boost inductor or inductor at input filter. Different from the other converters, burst operation in PFC block is not needed because PFC block itself is normally disabled during standby mode. To improve this kind of unwanted burst oper ...
Crouzet Solid State Relay Technical Presentation
... application of a control signal and to ‘tell’ the SSR that it must turn on. Optical Isolation; The optical isolator in a SSR provides isolation between the input circuitry / control system, and the output circuit connected to the AC mains. The type of optical isolator used in the relay may also dete ...
... application of a control signal and to ‘tell’ the SSR that it must turn on. Optical Isolation; The optical isolator in a SSR provides isolation between the input circuitry / control system, and the output circuit connected to the AC mains. The type of optical isolator used in the relay may also dete ...
s-8813 series charge pump ic - SII Semiconductor Corporation
... switching transistors are switched ON/OFF with the clock generated by the internal oscillator (OSC), and operates the step-up charge pump. The output voltage is feed back and the voltage split by feedback resistances Rs and Rf and reference voltage (Vref) are compared by a comparator. This comparato ...
... switching transistors are switched ON/OFF with the clock generated by the internal oscillator (OSC), and operates the step-up charge pump. The output voltage is feed back and the voltage split by feedback resistances Rs and Rf and reference voltage (Vref) are compared by a comparator. This comparato ...
MAX3250 DS
... shown in the Typical Operating Characteristics. Insert a 1kΩ 1/4W resistor in series with any isolation test voltage when testing for maximum values of applied isolation voltage. Exceeding the maximum limits of voltage and frequency (see the Typical Operating Characteristics) could trigger a holding ...
... shown in the Typical Operating Characteristics. Insert a 1kΩ 1/4W resistor in series with any isolation test voltage when testing for maximum values of applied isolation voltage. Exceeding the maximum limits of voltage and frequency (see the Typical Operating Characteristics) could trigger a holding ...
GB Masterys Green Power 100-120 Tender Document
... dedicated lock or mechanical protection requiring a tool to open ...
... dedicated lock or mechanical protection requiring a tool to open ...
ADDC02808PB 28 V, 200 W Pulsed DC/DC Converter with Integral
... voltage drops from VO nom to VSC during a short circuit condition. It does not let the current fold back below the maximum rated output current. The output overvoltage protection circuitry, which is independent from the normal feedback loop, protects the load against a break in the remote sense lead ...
... voltage drops from VO nom to VSC during a short circuit condition. It does not let the current fold back below the maximum rated output current. The output overvoltage protection circuitry, which is independent from the normal feedback loop, protects the load against a break in the remote sense lead ...
June 2006 High Speed Low Power RS485 Transceivers with
... frequency spectrums operating at 250kbps. SLO mode significantly reduces the high frequency harmonics. The LTC2859 and LTC2861 drivers feature current limiting that protects them from faults such as shorting the outputs to the power supply or ground. Short circuit current is limited to below the ±25 ...
... frequency spectrums operating at 250kbps. SLO mode significantly reduces the high frequency harmonics. The LTC2859 and LTC2861 drivers feature current limiting that protects them from faults such as shorting the outputs to the power supply or ground. Short circuit current is limited to below the ±25 ...
Current Control of VSI-PWM Inverters
... Hysteresis Controller: Three Dependent Controls In many applications the inverter switching frequency can be reduced if a zero voltage vector is applied at the appropriate time. Also, the maximum current error can be limited within the hysteresis band, rather than twice the band, with proper control ...
... Hysteresis Controller: Three Dependent Controls In many applications the inverter switching frequency can be reduced if a zero voltage vector is applied at the appropriate time. Also, the maximum current error can be limited within the hysteresis band, rather than twice the band, with proper control ...
SP385A
... The Sipex SP385A is a +3V to +5V EIA-232/EIA562 line transceiver. It is a pin-for-pin alternative for the SP310A and will operate in the same socket with capacitors ranging from 0.1µF to 10µF, either polarized or non–polarized, in +3V supplies. The SP385A offers the same features such as 120kbps gua ...
... The Sipex SP385A is a +3V to +5V EIA-232/EIA562 line transceiver. It is a pin-for-pin alternative for the SP310A and will operate in the same socket with capacitors ranging from 0.1µF to 10µF, either polarized or non–polarized, in +3V supplies. The SP385A offers the same features such as 120kbps gua ...
400- to 690-V AC Input 50-W Flyback Isolated
... blocks. The power section contains a rectifier, a dc link, inrush current limiting, and an insulated-gate bipolar transistor (IGBT) based inverter. VSD can be based on single or dual controller architecture. When using single controller architecture, the same processor controls generation of pulse-w ...
... blocks. The power section contains a rectifier, a dc link, inrush current limiting, and an insulated-gate bipolar transistor (IGBT) based inverter. VSD can be based on single or dual controller architecture. When using single controller architecture, the same processor controls generation of pulse-w ...
Pulse-width modulation
Pulse-width modulation (PWM), or pulse-duration modulation (PDM), is a modulation technique used to encode a message into a pulsing signal. Although this modulation technique can be used to encode information for transmission, its main use is to allow the control of the power supplied to electrical devices, especially to inertial loads such as motors. In addition, PWM is one of the two principal algorithms used in photovoltaic solar battery chargers, the other being MPPT.The average value of voltage (and current) fed to the load is controlled by turning the switch between supply and load on and off at a fast rate. The longer the switch is on compared to the off periods, the higher the total power supplied to the load.The PWM switching frequency has to be much higher than what would affect the load (the device that uses the power), which is to say that the resultant waveform perceived by the load must be as smooth as possible. Typically switching has to be done several times a minute in an electric stove, 120 Hz in a lamp dimmer, from few kilohertz (kHz) to tens of kHz for a motor drive and well into the tens or hundreds of kHz in audio amplifiers and computer power supplies.The term duty cycle describes the proportion of 'on' time to the regular interval or 'period' of time; a low duty cycle corresponds to low power, because the power is off for most of the time. Duty cycle is expressed in percent, 100% being fully on.The main advantage of PWM is that power loss in the switching devices is very low. When a switch is off there is practically no current, and when it is on and power is being transferred to the load, there is almost no voltage drop across the switch. Power loss, being the product of voltage and current, is thus in both cases close to zero. PWM also works well with digital controls, which, because of their on/off nature, can easily set the needed duty cycle.PWM has also been used in certain communication systems where its duty cycle has been used to convey information over a communications channel.