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DC Motor Speed: System Modeling (Lab 6)
DC Motor Speed: System Modeling (Lab 6)

... It is generally preferred that a system respond to a command quickly. Why then might we prefer to use the lag compensator even though it is slower than the lead compensator? The advantage of the lag compensator in this case is that by responding more slowly it requires less control effort than the l ...
General Specifications MODEL UT320 Digital Indicating Controller
General Specifications MODEL UT320 Digital Indicating Controller

... the retransmission output/15V DC sensor power supply cannot be used. Current output Number of output points: 1 or 2 (2 for heating/cooling), Swiched between voltage pulse output and current output. Output signal: 4 to 20 mA Load resistance: 600 Ω or less Output accuracy: ±0.3% of span Performance in ...
Basic Electronics III Series/Parallel Combination
Basic Electronics III Series/Parallel Combination

... one another and which components are in parallel.  Series components must be in one current path without any branch points.  To find particular values for this type of circuit,  Reduce and combine the components using the rules for individual series and parallel circuits.  Reduce the circuit to ...
AN10909 Low VCEsat transistors in medium power load switch
AN10909 Low VCEsat transistors in medium power load switch

... Figure 2 and Figure 3 show VCEsat characteristics as a function of collector current IC. The smaller the IC/IB ratio (high IB current), the deeper the transistor is in saturation, and the lower the voltage drop across the collector-emitter junction VCEsat. Deep saturation results in lowest VCEsat dr ...
AD5405 AnaDev, dual I-dac, 58MSPS R2R, no ref.pdf
AD5405 AnaDev, dual I-dac, 58MSPS R2R, no ref.pdf

Photomultiplier Tubes. Construction and Operating Characteristics
Photomultiplier Tubes. Construction and Operating Characteristics

... of the synthetic silica is different from Kovar which is used for the tube leads, it is not suitable for the stem material of the tube (see Figure 1 on page 1). Borosilicate glass is used for the stem, then a graded seal using glasses with gradually different thermal expansion coefficients are conne ...
MAX17020 Dual Quick-PWM Step-Down Controller with Low-Power LDO, RTC Regulator General Description
MAX17020 Dual Quick-PWM Step-Down Controller with Low-Power LDO, RTC Regulator General Description

... power by operating in pulse-skipping mode or in ultrasonic mode to avoid audible noise. Ultrasonic mode forces the controller to maintain switching frequencies greater than 20kHz at light loads. An internal 100mA linear regulator can be used to either generate the 5V bias needed for power-up or othe ...
ADM1172 数据手册DataSheet 下载
ADM1172 数据手册DataSheet 下载

... delay is 272.9 ms/μF, and 21.7 ms/μF for a circuit breaker delay. When the TIMER pin is pulled beyond the upper threshold, the GATE turns off. Chip Ground Pin. Power-Fail Comparator Output. Digital output from the power-fail comparator. Input Pin. The ON (ON-CLR) pin is an input to a comparator that ...
MAX7031 Low-Cost, 308MHz, 315MHz, and 433.92MHz FSK Transceiver with Fractional-N PLL General Description
MAX7031 Low-Cost, 308MHz, 315MHz, and 433.92MHz FSK Transceiver with Fractional-N PLL General Description

... receiver’s local oscillator (LO) is generated by an integer-N PLL. This hybrid architecture eliminates the need for separate transmit and receive crystal reference oscillators because the fractional-N PLL is preset to be 10.7MHz above the receive LO. Retaining the fixed-N PLL for the receiver avoids ...
BDTIC
BDTIC

... During typical start-up with connected filaments of the lamp a current source IRES3 (20µA) is active as long as Vcc> 10,5V and VRES< VRESC1 (1,6V). An open Lowside filament is detected, when VRES> VRESC1. Such a condition will prevent the start-up of the IC. In addition the comparator threshold is s ...
TLC274, TLC274A, TLC274B, TLC274Y, TLC279 LinCMOS
TLC274, TLC274A, TLC274B, TLC274Y, TLC279 LinCMOS

... TLC274 and TLC279. The devices also exhibit low voltage single-supply operation, making them ideally suited for remote and inaccessible battery-powered applications. The common-mode input voltage range includes the negative rail. A wide range of packaging options is available, including small-outlin ...
1K/2K/3K Online UPS Uninterruptible Power Supply
1K/2K/3K Online UPS Uninterruptible Power Supply

...  Caution - risk of electric shock. Even after the unit is disconnected from the mains (building wiring outlet), components inside the UPS system are still connected to the battery and electrically live and dangerous.  Before carrying out any kind of service and/or maintenance, disconnect the batte ...
Short-Circuit kVA
Short-Circuit kVA

... and percentage reactance of each element of the network. (ii) Value of base kVA convert to all percentage reactances to this base value. (iii) Corresponding to the single line diagram of the network, draw the reactance diagram showing one phase of the system and the neutral. Indicate the % reactance ...
AD9755 数据手册DataSheet 下载
AD9755 数据手册DataSheet 下载

... The AD9755 has been optimized for ultrahigh speed applications up to 300 MSPS where data rates exceed those possible on a single data interface port DAC. The digital interface consists of two buffered latches as well as control logic. These latches can be time multiplexed to the high speed DAC in se ...
Understanding Buck-Boost Power Stages in
Understanding Buck-Boost Power Stages in

... cycle. It starts at zero, reaches a peak value, and returns to zero during each switching cycle. The two different modes are discussed in greater detail later and design guidelines for the inductor value to maintain a chosen mode of operation as a function of rated load are given. It is very desirab ...
Electric Current and Cell Membranes
Electric Current and Cell Membranes

... and therefore there is only a pulse of electric current in this case. In order to maintain a flow of electric charge, an external source of energy per unit charge, traditionally called an emf (pronounced “ee em eff,” and short for the misnomer—electromagnetic force— because it is not really a force) ...
AD8037
AD8037

... clamping amplifiers. The AD8036 is unity gain stable. The AD8037 is stable at a gain of two or greater. These devices allow the designer to specify a high (VCH) and low (VCL) output clamp voltage. The output signal will clamp at these specified levels. Utilizing a unique patent pending CLAMPIN™ inpu ...
Chapter 4 - UniMAP Portal
Chapter 4 - UniMAP Portal

... meaning that their readable display is in the form of numerical digits. ...
LT3952 - 60V LED Driver with 4A Switch Current
LT3952 - 60V LED Driver with 4A Switch Current

MAX4508/MAX4509 Fault-Protected, High-Voltage Single 8-to-1/ Dual 4-to-1 Multiplexers with Output Clamps General Description
MAX4508/MAX4509 Fault-Protected, High-Voltage Single 8-to-1/ Dual 4-to-1 Multiplexers with Output Clamps General Description

... Note 7: Off-Isolation = 20log10 (VCOM_ / VNO_ ), where VCOM_ = output and VNO_ = input to off switch. Note 8: Between any two analog inputs. Note 9: Leakage testing for single-supply operation is guaranteed by testing with dual supplies. Note 10: Guaranteed by testing with dual supplies. Note 2: Not ...
NCP1396A, NCP1396B High Performance Resonant Mode Controller featuring High--Voltage Drivers
NCP1396A, NCP1396B High Performance Resonant Mode Controller featuring High--Voltage Drivers

... excursion: In resonant applications, it is important to stay away from the resonating peak to keep operating the converter in the right region. Thanks to a single external resistor, the designer can program its lowest frequency point, obtained in lack of feedback voltage (during the startup sequence ...
LT3952 - 60V LED Driver with 4A Switch Current
LT3952 - 60V LED Driver with 4A Switch Current

... The input current sense amplifier reduces the switching current in the case of an overload. VC is reduced when the IVINP-IVINN voltage exceeds the 60mV built-in potential. Tie IVINP-IVINN across an external sense resistor to set auxiliary current limit. If unused, tie to VIN. IVINP (Pin 6): Auxiliar ...
RT8162A - Richtek Technology
RT8162A - Richtek Technology

Synthesis of Medium Voltage dc-to-dc Converters From Low
Synthesis of Medium Voltage dc-to-dc Converters From Low

AN29 - Some Thoughts on DC/DC Converters
AN29 - Some Thoughts on DC/DC Converters

... normally associated with this type converter. L1’s output is rectified, filtered and regulated to obtain the final out- ...
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Current mirror

A current mirror is a circuit designed to copy a current through one active device by controlling the current in another active device of a circuit, keeping the output current constant regardless of loading. The current being 'copied' can be, and sometimes is, a varying signal current. Conceptually, an ideal current mirror is simply an ideal inverting current amplifier that reverses the current direction as well or it is a current-controlled current source (CCCS). The current mirror is used to provide bias currents and active loads to circuits. It can also be used to model a more realistic current source (since ideal current sources don't exist).The circuit topology covered here is one that appears in many monolithic ICs. It is a Widlar mirror without an emitter degeneration resistor in the follower (output) transistor. This topology can only be done in an IC as the matching has to be extremely close and cannot be achieved with discretes.Another topology is the Wilson mirror. The Wilson mirror solves the Early effect voltage problem in his design.
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