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Solve Data Acquisition Compatibility Problems by Combining
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Monotonic, Inrush Current Limited Start-Up for
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... Figures 2–9) improves stability when operating from lowimpedance sources such as high-current laboratory bench power supplies. This resistor can be omitted when operating from higher impedance sources such as lithium or alkaline batteries. For some designs, such as an LED driver, input ripple is mor ...
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Application Note 1724 LM5015 Isolated Two-Switch DC
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... input capacitance. Measurement rise time depends both on the equivalent source resistance and the effective meter input capaci­ tance, which depends both on the electrometer input capacitance and the connecting cable capacitance. Thus, for high resistance measurements, even a small amount of cable c ...
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... RDS(on) = 0.73 Ω (typical value @ 25 °C), with intrinsic fast freewheeling diode. Cross conduction protection is achieved using a dead time (td = 1 µs typical) between the switch off and switch on of two power MOS in one leg of a bridge. Using N-channel power MOS for the upper transistors in the bri ...
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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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