STMicroelectronics is pleased to present the
... The performance of the stepper motor drive can be improved using voltage mode drives, giving smoother operation and higher resolution. However, current mode drives have typically been used, since they inherently compensate for increases in the back EMF and variations in power supply voltages. This p ...
... The performance of the stepper motor drive can be improved using voltage mode drives, giving smoother operation and higher resolution. However, current mode drives have typically been used, since they inherently compensate for increases in the back EMF and variations in power supply voltages. This p ...
The Freja charging study: A perspective five years later
... •Each single requirement is hard to meet, and combined it is more or less impossible to build a component that meet all requirements (voltage, leakage current, temperature and size). •Lowest leakage current is reached with own-built reed-relay (fA or pA) •Smallest size is reached by MEMS-based switc ...
... •Each single requirement is hard to meet, and combined it is more or less impossible to build a component that meet all requirements (voltage, leakage current, temperature and size). •Lowest leakage current is reached with own-built reed-relay (fA or pA) •Smallest size is reached by MEMS-based switc ...
UniValve Lit 7/15/01
... The UniValve will initially be sold only as a head. It features a metal chassis, powder coated and enclosed in a perforated steel cage to protect the tubes. In the coming months, we will be introducing a number of different combo cabinet and head box configurations. The UniValve can be installed in ...
... The UniValve will initially be sold only as a head. It features a metal chassis, powder coated and enclosed in a perforated steel cage to protect the tubes. In the coming months, we will be introducing a number of different combo cabinet and head box configurations. The UniValve can be installed in ...
2A Sink/Source Bus Termination EUP7171 DESCRIPTION
... REFEN is an external reference input for the EUP7171. For SSTL-2 applications, VREF should be a 1.25V that the regulator can trace for termination voltage VOUT. It is recommended to place a 0.01uF to 0.1uF bypass capacitor at close to the VREF pin. An additional function included in the VREF is an a ...
... REFEN is an external reference input for the EUP7171. For SSTL-2 applications, VREF should be a 1.25V that the regulator can trace for termination voltage VOUT. It is recommended to place a 0.01uF to 0.1uF bypass capacitor at close to the VREF pin. An additional function included in the VREF is an a ...
KFD2-CD-Ex1.32-** Current/Voltage Driver Connection Assembly
... This barrier is designed to provide various inputs and outputs of voltage and current: • Current input option A current limit circuit in series to terminal 9 protects the device from damage. The max. voltage drop at the input is DC 4 V, allowing for the connection of several KFD2-CD32-Ex1.32 repeate ...
... This barrier is designed to provide various inputs and outputs of voltage and current: • Current input option A current limit circuit in series to terminal 9 protects the device from damage. The max. voltage drop at the input is DC 4 V, allowing for the connection of several KFD2-CD32-Ex1.32 repeate ...
Gen3 XPhase ® DDR3 Chipset Solution
... • 4 different VREF1 voltages are selectable using 2 VID pins if I2C communication is not available • VTT tracking defaults to ½ the VDD remote sense amp output voltage • VDD to VTT overvoltage protection • Soft-stop turn-off to ensure VDDR and Vtt tracking ...
... • 4 different VREF1 voltages are selectable using 2 VID pins if I2C communication is not available • VTT tracking defaults to ½ the VDD remote sense amp output voltage • VDD to VTT overvoltage protection • Soft-stop turn-off to ensure VDDR and Vtt tracking ...
MAX1556/MAX1556A/MAX1557 16µA I , 1.2A PWM Step-Down DC-DC Converters
... The MAX1556/MAX1556A/MAX1557 use of a wide-band control loop and voltage positioning allows superior load-transient response by minimizing the amplitude and duration of overshoot and undershoot in response to load transients. Other DC-DC converters, with high gain-control loops, use external compens ...
... The MAX1556/MAX1556A/MAX1557 use of a wide-band control loop and voltage positioning allows superior load-transient response by minimizing the amplitude and duration of overshoot and undershoot in response to load transients. Other DC-DC converters, with high gain-control loops, use external compens ...
Variable Inductance Transducers
... 1. Write equations for the amplifier and filter circuits and, using them, give expressions for the voltage signals v1, v2, v3, and vo 2. Suppose that the carrier frequency is ω c = 500 rad s and the filter resistance R = 100 kΩ . If carrier component to be less than 5% through the filter, estimate ...
... 1. Write equations for the amplifier and filter circuits and, using them, give expressions for the voltage signals v1, v2, v3, and vo 2. Suppose that the carrier frequency is ω c = 500 rad s and the filter resistance R = 100 kΩ . If carrier component to be less than 5% through the filter, estimate ...
Datasheet
... module designed to provide up to 100A of output current into a 48V nominal system. This rectifier has been especially designed to be used in conjunction with a battery to provide an uninterruptible DC power system. The low noise and high reliability make it ideally suited to telecommunications appli ...
... module designed to provide up to 100A of output current into a 48V nominal system. This rectifier has been especially designed to be used in conjunction with a battery to provide an uninterruptible DC power system. The low noise and high reliability make it ideally suited to telecommunications appli ...
LP121X04 - Spectrah
... symmetrical current waveform.(Asymmetrical ratio is less than 10%) Please do not use the inverter which has asymmetrical voltage and asymmetrical current and spike wave. Lamp frequency may produce interface with horizontal synchronous frequency and as a result this may cause beat on the display. The ...
... symmetrical current waveform.(Asymmetrical ratio is less than 10%) Please do not use the inverter which has asymmetrical voltage and asymmetrical current and spike wave. Lamp frequency may produce interface with horizontal synchronous frequency and as a result this may cause beat on the display. The ...
Lecture 1 - Digilent Inc.
... • So far, with the exception of our ideal power sources, all the circuit elements we have examined have been passive – Total energy delivered by the circuit to the element is non-negative ...
... • So far, with the exception of our ideal power sources, all the circuit elements we have examined have been passive – Total energy delivered by the circuit to the element is non-negative ...
CAT4237EVAL2EVB CAT4237 High Voltage White LED Driver Evaluation Board User's Manual
... The CAT4237 is a high voltage CMOS constant−current DC/DC converter that has been designed to drive with high efficiency white or other high brightness LEDs. The high−voltage output stage allows driving up to 8 white LEDs in series. A single external resistor sets the LED current between 5 mA and 30 ...
... The CAT4237 is a high voltage CMOS constant−current DC/DC converter that has been designed to drive with high efficiency white or other high brightness LEDs. The high−voltage output stage allows driving up to 8 white LEDs in series. A single external resistor sets the LED current between 5 mA and 30 ...
RF1 User Manual - HDR Power Systems
... The isolated input works best with an offset Command Signal such as 4-20ma; however, it will work with both offset and zero based Command Signals. Zero based Command Signals may have a small amount of non-linearity (input to output) at the low end. This should not be a problem on closed loop systems ...
... The isolated input works best with an offset Command Signal such as 4-20ma; however, it will work with both offset and zero based Command Signals. Zero based Command Signals may have a small amount of non-linearity (input to output) at the low end. This should not be a problem on closed loop systems ...
EVALUATION AND DESIGN SUPPORT
... DAC output voltages up to 30 V. The output voltages are used to set the bias voltage for BST capacitors, which, in turn, adjust the antenna response. Figure 2 shows the equivalent circuit of a BST capacitor used as a tunable matching network, and Figure 3 shows the transfer function of the BST capac ...
... DAC output voltages up to 30 V. The output voltages are used to set the bias voltage for BST capacitors, which, in turn, adjust the antenna response. Figure 2 shows the equivalent circuit of a BST capacitor used as a tunable matching network, and Figure 3 shows the transfer function of the BST capac ...
LC200 LED Lighting Controller User Manual 1 Disclaimer 2 Safety
... The user must ensure that the potential difference between any combination of applied signals does not exceed the supply voltage. WARNING: Higher voltages may cause a danger to personal health. The LC200 does not have complete tracking isolation of inputs and outputs. Transients caused by inductive ...
... The user must ensure that the potential difference between any combination of applied signals does not exceed the supply voltage. WARNING: Higher voltages may cause a danger to personal health. The LC200 does not have complete tracking isolation of inputs and outputs. Transients caused by inductive ...
ZXTN2010A 60V NPN LOW SATURATION MEDIUM POWER TRANSISTOR IN E-LINE SUMMARY BV
... Fax: (49) 89 45 49 49 49 [email protected] ...
... Fax: (49) 89 45 49 49 49 [email protected] ...
Tech Note 10 Microphone Amplifier Design, or, Why
... cables may be used between the mic and the next audio stages. The problem is that microphones are mostly operated on internationally-standardized phantom power, which sets some hard limits on the amount of power available for such a circuit. Modern sound recording requires a very wide dynamic range ...
... cables may be used between the mic and the next audio stages. The problem is that microphones are mostly operated on internationally-standardized phantom power, which sets some hard limits on the amount of power available for such a circuit. Modern sound recording requires a very wide dynamic range ...
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.