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The 2N3904 is a common NPN bipolar junction transistor used for general-purpose low-power amplifying or switching applications. [1] [2] [3] It is designed for low current and power, medium voltage, and can operate at moderately high speeds. It is complementary to the 2N3906 PNP transistor. Both types were registered by Motorola Semiconductor in ...
The 2N3904 is an NPN transistor that can only switch one-third the current of the 2N2222 but has otherwise similar characteristics. The 2N3904 exhibits its forward gain (beta) peak at a lower current than the 2N2222, and is useful in amplifier applications with reduced I c , e.g., (gain peak at 10 mA for the 2N3904 but 150 mA for the 2N2222).
In 1956, GE engineers added an NPN transistor companion to the 2N107. They designated it the 2N170, manufactured with the rate grown junction process originally developed by Bell Labs. [ 6 ] It was designed for use in higher frequency applications, such as radio frequency (RF) amplification, while the 2N107 was for low frequency audio amplifier ...
A multiple-emitter transistor is a specialized bipolar transistor mostly used at the inputs of integrated circuit TTL NAND logic gates. Input signals are applied to the emitters . The voltage presented to the following stage is pulled low if any one or more of the base–emitter junctions is forward biased, allowing logical operations to be ...
Since the device used is an NPN transistor, is a positive going output while is a negative going output: using a PNP transistor reverses the polarities of outputs. The description of their simplified versions, where resistor R E {\displaystyle R_{E}} or R L {\displaystyle R_{L}} is set to zero ohm (obviously not both) in order to have a single ...
BC108 family transistors from various manufacturers (ITT, CEMI, SGS-ATES, Siemens)The BC107, BC108 and BC109 are general-purpose low power silicon NPN bipolar junction transistors found very often in equipment and electronics books/articles from Europe, Australia [1] and many other countries from the 1960s.
Figure 1: Basic NPN common collector circuit (neglecting biasing details). In electronics, a common collector amplifier (also known as an emitter follower) is one of three basic single-stage bipolar junction transistor (BJT) amplifier topologies, typically used as a voltage buffer.
For NPN open collector outputs, the emitter of the NPN transistor is internally connected to ground, [1] so the NPN open collector internally forms either a short-circuit (technically low impedance or "low-Z") connection to the low voltage (which could be ground) when the transistor is switched on, or an open-circuit (technically high impedance ...