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MAX16033–MAX16040 Low-Power Battery Backup Circuits in Small µDFN Packages General Description
MAX16033–MAX16040 Low-Power Battery Backup Circuits in Small µDFN Packages General Description

... The Typical Operating Circuit shows a typical connection for the MAX16033–MAX16040. OUT powers the static random-access memory (SRAM). If V CC is greater than the reset threshold (VTH), or if VCC is lower than VTH but higher than VBATT, VCC is connected to OUT. If VCC is lower than VTH and VCC is le ...
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... because the capacitor is charged by a constant current. The transfer function of the voltage switch charge pump may be used. In fact it is even more valid, because the transfer function is no longer restricted for small changes only. Further the current is independent from both the supply voltage an ...
Practical Temperature Measurements*
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... It seems logical to ask: If we already have a device that will measure absolute temperature (like an RTD or thermistor), why do we even bother with a thermocouple that requires reference junction Z-23 ...
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... are separated by an insulating material or dielectric. The dielectric used in all tantalum electrolytic capacitors is tantalum pentoxide. Tantalum pentoxide compound possesses high-dielectric strength and a high-dielectric constant. As capacitors are being manufactured, a film of tantalum pentoxide ...
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... „ When transporting or moving the Power Supply, do not lay it down. Also, handle the Power Supply with care so as not to make an impact such as drop on it. „ Install the Power Supply on a firm and level surface. If it is used inclined or on its side, it may have a malfunction. Also, provide 10 cm cl ...
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... • Since the noise voltage squared is proportional to f. This implies that if the interval is infinite, the noise power contributed by the resistor is also infinite. • In reality the above equation must be modified above 100 MHz, but is sufficiently accurate for low frequency • R(f) is the real part ...
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... mean square (rms) voltage and root mean square current that are of the most practical use. This is due to the common and useful analogy to DC circuits. In DC circuits, power dissipation is calculated by the relationship, ...
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... via the rear-panel bias terminals or via the proper pins on the rear edge connector. The applied voltages should not exceed ±200 volts from the HI terminal to ground, or ±400 volts from the LO terminal to ground. When bias is applied to one side only, it is recommended that the other bias terminal b ...
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... 60-Hz rejection for noisy industrial environments. A low-noise, programmable gain amplifier (PGA) provides gains ranging from 1 to 128 to amplify lowlevel signals for resistive bridge or thermocouple applications. Additionally, these devices integrate a low-drift, 2.5-V reference that reduces printe ...
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... L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Patents Pending. ...
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... Package thermal impedance, θJA (see Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40°C/W Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C † Stresses ...
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... thermal budget of the circuit board and the current sense resistor. The ILD4001 is widely suitable for LED applications with supply voltages up to 42 V. A multifunctional enable pin allows dimming of the LEDs with DC voltage or a PWM signal. Furthermore the enable pin can be used to switch the LED c ...
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... This master thesis presents a method for stability analysis. The dynamics of an electric system are described through frequency dependent impedances and admittances. This is presented with the basis of an electric traction vehicle. The frequency responses of the vehicle are revealed and verified thr ...
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... unloaded busbars or short overhead lines. The present study is a search for possibilities to increase the current interruption capability with auxiliary devices interacting with the switching arc. In this project the state of the art of disconnector switching is investiga ...
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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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