Huffman was an electrical engineering and a pioneer of computer science who remains well-known for his 1952 paper describing a sometimes-optimal compression algorithm. G Graphs: Graphs should have a title or caption and properly labeled axes. Capacitors: Energy Stored in a capacitor is 1/2 C V^2į Fourier Series: Any practical periodic voltage signal can be represented as a sum of sinusoids.Batteries: Energy Stored in a capacitor is QV.Diode: Diodes allow current flow in one direction but not the other.Į Electric Charge: Opposite charges attract and like charges repel.Įnergy: A property of objects whose quantity is a limitation on the capactity to do work. Current Divider Rule (VDR): The largest current is through the smallest resistance in parallel.ĭ Digital Signals: A digital signal is a sequence of discrete symbols. They can collect and release charge very quickly.Ĭompression: The removal of non-essential elements from data to distill it down to critical information.Ĭurrent: A current is a rate of flow of charge. Datasheet: You can look up a BJT's characteristics online.Ĭ Circuits: A circuit is an arrangement of connected elements through which current can flow.Ĭapacitors: A capacitor can store electrical potential energy. Voltage Amplifier: Although the raw look at the BJT is based upon the amplification of a current, the basic configuration also leads quickly to analysis as a voltage amplifier (think "guitar amp"!). Circuit Analysis: Step through the BJT modes to analyze a common emitter circuit. The BJT model defines three operating modes. Operating Regions: OFF, ACTIVE and SATURATED
Output I-V Characteristic: The collector-emitter I-V is a set of curves, one for each IB. Input I-V Characteristic: The base-emitter connection is modeled as a p-n junction (a diode). Common Emitter Switch: A BJT that toggles between OFF and an ON mode is a switch. Common Emitter: Although the BJT can be wired into a circuit in many different ways, ECE 110 limits the configuration so as not to confuse during the basic introduction. Current Flow: The essence of a BJT is that a small current controls a large current. Bipolar Junction Transistor (BJT): A semiconductor device that serves as an electrical switch or amplifier. Two examples include (1) the common-emitter BJT configuration where V CC and R C provide a bias voltage to the collector that allows for the typical set of IV responses provided in the datasheets and (2) an electret condenser microphone that requires a a resistor (typically around 1-10 kOhm) to tie the drain of an internal JFET preamp to a voltage source (typically 3-9 V). This energy is stored in chemical form is readily available for conversion into electrical energy.īias: A bias (or bias voltage) is the voltage needed by device for proper function. See also: MasterNotationSheet Analog Signals: An analog signal exists throughout a continuous interval of time and/or takes on a continuous range of values.ī Batteries: A battery is a limited source of energy.
0 kommentar(er)
