![]() ![]() With the load current effectively zero, \$R_2\$ and \$R_4\$ act as an uncontrolled (but small) collector bypass current that pulls up on \$Q_1\$'s collector enough to likely yield an almost zero \$^\$ and it is now that we need to focus much more closely on precisely when the foldback might happen.īut even after the change-over, when the current direction in \$R_2\$ has reversed, \$Q_1\$ is still heavily saturated (in a properly designed circuit.) \$Q_2\$'s collector hasn't yet replaced enough of it to push \$Q_1\$ out of saturation. \$Q_1\$'s base-emitter junction is mostly just a diode junction here. \$Q_1\$ is fully saturated and the current in \$R_1\$ is almost the same as the current in \$R_3\$. Papier Broklammern Metall Broklammern Farbe Set Verschiedene Gren, fr Bro, Schul- und Heimnotizen Brief Broklammer Brobedarf 70 14,99 Lieferung bis Freitag, 12. Simulate this circuit – Schematic created using CircuitLab Foldback Klammern, SidiOutil Premium 145 Stk. ![]() I've used a small green arrow to point out this detail: if you carefully look, you can see that the direction through \$R_2\$ is diametrically opposite in these two cases. Clips different Figures, Gold, Stern, Herz, Planet, Mond, premium Buchklammern, Paper, Wire-Clips, Broklammern, Foldback-Klammern. Diese 15 Lifehacks sind ideal, um lstige Alltagsprobleme zu lsen. Diagram 2 shows the arrangement where the load current is moving sufficiently towards foldback that \$R_2\$ is now supplementing \$Q_2\$'s base current (along with current through \$R_4\$) and foldback is near. 15 Foldback-Klammer-Lifehacks: Diese genialen Tricks zeigen, dass die Klammern mehr knnen, als Papier zusammenzuheften. Diagram 1 shows the arrangement where the load current hasn't yet risen to the point where \$Q_2\$'s collector current is significant and where the current in \$R_2\$ is pulling up on \$Q_2\$'s base, keeping it out of a foldback behavior. These diagrams are arranged so that you can focus on their operation during two different phases. 40 Blatt (bei einer Papierstrke von typischerweise 80 g/m 2, Faustregel: 10 Blatt 1 mm). Beispielsweise haben 13 mm breite Klemmen eine 4 mm Klemmweite und eignen sich zum Zusammenklemmen von ca. I've drawn two versions of the same schematic below. Foldback-Klammern gibt es in Breiten von 5 mm (0,2) bis 50 mm (2) mit diversen Klemmweiten.
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