Signals and Systems
... time. This is done by adding or subtracting the amount of the shift to the time variable in the function. Subtracting a fixed amount from the time variable will shift the signal to the right (delay) that amount, while adding to the time variable will shift the signal to the left ...
... time. This is done by adding or subtracting the amount of the shift to the time variable in the function. Subtracting a fixed amount from the time variable will shift the signal to the right (delay) that amount, while adding to the time variable will shift the signal to the left ...
5-Line Transient Voltage Suppressor Array
... to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, ...
... to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, ...
Zero-voltage switching for three-level capacitor clamping
... Abstract—A zero-voltage switching (ZVS) scheme for a threelevel capacitor clamping inverter based on the true pulsewidth modulation (PWM) pole is proposed in this paper. With this scheme, the main switches work with ZVS through the assistance of a small rating zero-current switching (ZCS) lossless a ...
... Abstract—A zero-voltage switching (ZVS) scheme for a threelevel capacitor clamping inverter based on the true pulsewidth modulation (PWM) pole is proposed in this paper. With this scheme, the main switches work with ZVS through the assistance of a small rating zero-current switching (ZCS) lossless a ...
Week 12: Output Stages, Frequency Response
... – additional gain – shifting the dc level of the signal ...
... – additional gain – shifting the dc level of the signal ...
voltage reduction schemes
... in the technical literature. The real definitive studies are very specific to individual utility load characteristics which differ widely from utility to utility and are not generally available for public viewing. They are regulatory sensitive issues and normally private. In general, however, the fo ...
... in the technical literature. The real definitive studies are very specific to individual utility load characteristics which differ widely from utility to utility and are not generally available for public viewing. They are regulatory sensitive issues and normally private. In general, however, the fo ...
HAMTRONICS® R139 REV B WEATHER SATELLITE RECEIVER
... Figure 2 illustrates one possible method of activating a tape recorder. If your tape deck has a motor circuit which returns to ground which is common with the receiver ground and draws less than 50 mA, you can use the transistor directly to switch the motor on and off. If the motor circuit draws mor ...
... Figure 2 illustrates one possible method of activating a tape recorder. If your tape deck has a motor circuit which returns to ground which is common with the receiver ground and draws less than 50 mA, you can use the transistor directly to switch the motor on and off. If the motor circuit draws mor ...
HongKong HK12B5 FEATURES
... WE is high for a Read Cycle OE= VIH or VIL. If OE= VIH during write cycle, the output butters remain in a high impedance state. 3. tWP is specified as the logical AND of CE and WE . TWP is measured from the latter of CE or WE going low to the earlier of CE or WE going high. 4. tDH, tDS are measured ...
... WE is high for a Read Cycle OE= VIH or VIL. If OE= VIH during write cycle, the output butters remain in a high impedance state. 3. tWP is specified as the logical AND of CE and WE . TWP is measured from the latter of CE or WE going low to the earlier of CE or WE going high. 4. tDH, tDS are measured ...
MAX1636 Low-Voltage, Precision Step-Down Controller for Portable CPU Power General Description
... The MAX1636 features a logic-controlled and synchronizable, fixed-frequency, pulse-width-modulation (PWM) operating mode that reduces noise and RF interference in sensitive mobile communications and pen-entry applications. Holding SKIP high forces fixed-frequency mode for lowest noise under all load ...
... The MAX1636 features a logic-controlled and synchronizable, fixed-frequency, pulse-width-modulation (PWM) operating mode that reduces noise and RF interference in sensitive mobile communications and pen-entry applications. Holding SKIP high forces fixed-frequency mode for lowest noise under all load ...
ECE 322L Lab 5: MOSFET Amplifiers
... The CS and CD MOSFET amplifiers can be compared to the CE and CC BJT amplifiers respectively. Like the CE amplifier, the CS amplifier has a negative voltage gain and an output impedance approximately equal to the drain resistor (collector resistor for the CE amplifier). The CD amplifier is comparabl ...
... The CS and CD MOSFET amplifiers can be compared to the CE and CC BJT amplifiers respectively. Like the CE amplifier, the CS amplifier has a negative voltage gain and an output impedance approximately equal to the drain resistor (collector resistor for the CE amplifier). The CD amplifier is comparabl ...
APE8862 - Advanced Power Electronics Corp.
... So the ESR of output capacitor is very important because it generates a zero to provide phase lead for loop stability. There are no requirements for the ESR on the input capacitor, but its voltage and temperature coefficient have to be considered for device application environment. 2.Protection Feat ...
... So the ESR of output capacitor is very important because it generates a zero to provide phase lead for loop stability. There are no requirements for the ESR on the input capacitor, but its voltage and temperature coefficient have to be considered for device application environment. 2.Protection Feat ...
EVBUM2156 - Power-over-Ethernet PD Interface
... input capacitance of the PD should be limited to less than 150 nF. When the input capacitance is higher, the capacitor charge current will influence the detection resistance measurements, and the detection signature will be invalid. Under no circumstance is it allowed to connect the bulk input capac ...
... input capacitance of the PD should be limited to less than 150 nF. When the input capacitance is higher, the capacitor charge current will influence the detection resistance measurements, and the detection signature will be invalid. Under no circumstance is it allowed to connect the bulk input capac ...
Physics 160 Lecture 18
... with higher performance from trying to carry all the current. – If more current flows through one transistor transistor, the increased voltage drop in the emitter resistor will reduce VBE (negative feedback). ...
... with higher performance from trying to carry all the current. – If more current flows through one transistor transistor, the increased voltage drop in the emitter resistor will reduce VBE (negative feedback). ...
uninterruptible power supplies
... The first thyristor rectifiers were presented in 1960. And since 1962 used together with thyristor controlled inverters as a UPS - uninterruptible power supply. In 1968 the uninterruptible electronic bypass device for inverters was manufactured. Switched-mode rectifiers and DC converters were delive ...
... The first thyristor rectifiers were presented in 1960. And since 1962 used together with thyristor controlled inverters as a UPS - uninterruptible power supply. In 1968 the uninterruptible electronic bypass device for inverters was manufactured. Switched-mode rectifiers and DC converters were delive ...
ha200 : Optoma USA : http://www2.optoma.com/us
... The Class-A topology is widely recognized as being the purest form of amplification, and this is because other topologies such as Class B and Class-AB require that two output devices be operated in "pushpull" fashion in order for each to handle one half of the musical waveform. At the point where a ...
... The Class-A topology is widely recognized as being the purest form of amplification, and this is because other topologies such as Class B and Class-AB require that two output devices be operated in "pushpull" fashion in order for each to handle one half of the musical waveform. At the point where a ...
TSH190_B13
... TS190, Hall-Effect sensor, designed for electronic commutation of brush-less DC motor applications. The device includes an on-chip Hall voltage generator for magnetic sensing, a comparator that amplifies the Hall Voltage, and a Schmitt trigger to provide switching hysteresis for noise rejection, ope ...
... TS190, Hall-Effect sensor, designed for electronic commutation of brush-less DC motor applications. The device includes an on-chip Hall voltage generator for magnetic sensing, a comparator that amplifies the Hall Voltage, and a Schmitt trigger to provide switching hysteresis for noise rejection, ope ...
样章下载
... 语Error! Use the Home tab to apply 标题 1,章名 to the text that you want to appear here.7 语 A voltage-controlled oscillator (VCO) whose frequency is controlled by an external voltage. The phase detector compares the phase of a periodic input signal against the phase of the VCO. Output of PD is a measu ...
... 语Error! Use the Home tab to apply 标题 1,章名 to the text that you want to appear here.7 语 A voltage-controlled oscillator (VCO) whose frequency is controlled by an external voltage. The phase detector compares the phase of a periodic input signal against the phase of the VCO. Output of PD is a measu ...
LM7905/LM7912/LM7915 Series 3-Terminal Negative Regulators
... intended to be functional, but do not guarantee Specific Performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. Note 2: Refer to Typical Performance Characteristics and Design Considerations for details. Note 3: Regulation is measured at a constant ...
... intended to be functional, but do not guarantee Specific Performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. Note 2: Refer to Typical Performance Characteristics and Design Considerations for details. Note 3: Regulation is measured at a constant ...
Stanford University
... cooled unit with redundant cooling so that failure of any one cabinet cooling fan or fan circuit will not affect continued operation at full load and ambient temperature of 77 degrees F (25 degrees C) or lower). Operate battery floating, isolated from the UPS AC input and AC output. The battery may ...
... cooled unit with redundant cooling so that failure of any one cabinet cooling fan or fan circuit will not affect continued operation at full load and ambient temperature of 77 degrees F (25 degrees C) or lower). Operate battery floating, isolated from the UPS AC input and AC output. The battery may ...
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.