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2. Open collector - Wikipedia

   en.wikipedia.org/wiki/Open_collector

   Open emitter output exposes the emitter as the output. [2] For an NPN open emitter output, the collector is connected to the positive voltage rail, so the emitter outputs a high voltage when the transistor is on and is hi-Z when off. For a PNP open emitter output, the collector is connected to the low voltage supply, so the emitter outputs a ...

3. Decoupling (electronics) - Wikipedia

   en.wikipedia.org/wiki/Decoupling_(electronics)

   A common example is connecting localized decoupling capacitors close to the power leads of integrated circuits to suppress coupling via the power supply connections. These act as a small localized energy reservoir that supply the circuit with current during transient , high current demand periods, preventing the voltage on the power supply rail ...

4. Common collector - Wikipedia

   en.wikipedia.org/wiki/Common_collector

   The transistor continuously monitors V diff and adjusts its emitter voltage to equal V in minus the mostly constant V BE (approximately one diode forward voltage drop) by passing the collector current through the emitter resistor R E. As a result, the output voltage follows the input voltage variations from V BE up to V +; hence the name ...

5. Bipolar transistor biasing - Wikipedia

   en.wikipedia.org/wiki/Bipolar_transistor_biasing

   Emitter bias. When a split supply (dual power supply) is available, this biasing circuit is the most effective. It provides zero bias voltage at the emitter or collector for load. [clarification needed] The negative supply V ee is used to forward-bias the emitter junction through R e. The positive supply V cc is used to reverse-bias the ...

6. Emitter-coupled logic - Wikipedia

   en.wikipedia.org/wiki/Emitter-coupled_logic

   The value of the supply voltage is chosen so that sufficient current flows through the compensating diodes D1 and D2 and the voltage drop across the common emitter resistor R E is adequate. ECL circuits available on the open market usually operated with logic levels incompatible with other families.

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9. Low-dropout regulator - Wikipedia

   en.wikipedia.org/wiki/Low-dropout_regulator

   Low-dropout (LDO) regulators operate similarly to all linear voltage regulators.The main difference between LDO and non-LDO regulators is their schematic topology.Instead of an emitter follower topology, low-dropout regulators consist of an open collector or open drain topology, where the transistor may be easily driven into saturation with the voltages available to the regulator.