UNIT 5 - WordPress.com
... being proportional to 1/RC and therefore, a wider frequency range is possible when using a variable capacitor. However, RC Oscillators are restricted to frequency applications because at high frequency the reactance offered by the capacitor is very low so it acts as a short circuit. ...
... being proportional to 1/RC and therefore, a wider frequency range is possible when using a variable capacitor. However, RC Oscillators are restricted to frequency applications because at high frequency the reactance offered by the capacitor is very low so it acts as a short circuit. ...
EUP3409 Dual 1.5MHz, 800mA Synchronous Step-Down Converter
... During normal operation, the EUP3409 regulates output voltage by switching at a constant frequency and then modulating the power transferred to the load each cycle using PWM comparator. The duty cycle is controlled by three weighted differential signals: the output of error amplifier, the main switc ...
... During normal operation, the EUP3409 regulates output voltage by switching at a constant frequency and then modulating the power transferred to the load each cycle using PWM comparator. The duty cycle is controlled by three weighted differential signals: the output of error amplifier, the main switc ...
doc - Seattle Central
... voltage. This could be accounted for by placing a resistor in parallel with the current source, but this would complicate the model, and isn’t done in this section. The characteristics of the base-emitter junction are the same as that of the diode looked at in Section 3. The voltage across the diode ...
... voltage. This could be accounted for by placing a resistor in parallel with the current source, but this would complicate the model, and isn’t done in this section. The characteristics of the base-emitter junction are the same as that of the diode looked at in Section 3. The voltage across the diode ...
The transistor
... A transistor is, like the diode, a semi-conductor. An “npn transistor” consists of three layers of semiconducting material an n-type / p-type/ n-type and thus has 2 junctions. These transistors are called npn transistors. There are a myriad of different types of transistor. An NPN transistor is a de ...
... A transistor is, like the diode, a semi-conductor. An “npn transistor” consists of three layers of semiconducting material an n-type / p-type/ n-type and thus has 2 junctions. These transistors are called npn transistors. There are a myriad of different types of transistor. An NPN transistor is a de ...
Transistor Basics
... The transistor is a current amplifier. In the previous example it's trying to let Hfe * Ib = 240mA flow through the collector. The transistor keeps lowering the voltage drop across the collector emitter junction (increasing the voltage drop across the 100Ω resistor and thus increasing the current) ...
... The transistor is a current amplifier. In the previous example it's trying to let Hfe * Ib = 240mA flow through the collector. The transistor keeps lowering the voltage drop across the collector emitter junction (increasing the voltage drop across the 100Ω resistor and thus increasing the current) ...
Example 16 - Rose
... Example 18 Design an op amp circuit such that vout 3v1 5v 2 4v3 . In this problem, we want to design a circuit having three inputs v1 , v 2 , and v 3 , and one output v out .The output must be related to the inputs by vout 3v1 5v 2 4v3 . This required circuit must multiply each input b ...
... Example 18 Design an op amp circuit such that vout 3v1 5v 2 4v3 . In this problem, we want to design a circuit having three inputs v1 , v 2 , and v 3 , and one output v out .The output must be related to the inputs by vout 3v1 5v 2 4v3 . This required circuit must multiply each input b ...
Transistor–transistor logic
Transistor–transistor logic (TTL) is a class of digital circuits built from bipolar junction transistors (BJT) and resistors. It is called transistor–transistor logic because both the logic gating function (e.g., AND) and the amplifying function are performed by transistors (contrast with RTL and DTL).TTL is notable for being a widespread integrated circuit (IC) family used in many applications such as computers, industrial controls, test equipment and instrumentation, consumer electronics, synthesizers, etc. The designation TTL is sometimes used to mean TTL-compatible logic levels, even when not associated directly with TTL integrated circuits, for example as a label on the inputs and outputs of electronic instruments.After their introduction in integrated circuit form in 1963 by Sylvania, TTL integrated circuits were manufactured by several semiconductor companies, with the 7400 series (also called 74xx) by Texas Instruments becoming particularly popular. TTL manufacturers offered a wide range of logic gate, flip-flops, counters, and other circuits. Several variations from the original bipolar TTL concept were developed, giving circuits with higher speed or lower power dissipation to allow optimization of a design. TTL circuits simplified design of systems compared to earlier logic families, offering superior speed to resistor–transistor logic (RTL) and easier design layout than emitter-coupled logic (ECL). The design of the input and outputs of TTL gates allowed many elements to be interconnected.TTL became the foundation of computers and other digital electronics. Even after much larger scale integrated circuits made multiple-circuit-board processors obsolete, TTL devices still found extensive use as the ""glue"" logic interfacing more densely integrated components. TTL devices were originally made in ceramic and plastic dual-in-line (DIP) packages, and flat-pack form. TTL chips are now also made in surface-mount packages. Successors to the original bipolar TTL logic often are interchangeable in function with the original circuits, but with improved speed or lower power dissipation.