Coupling and Bypassing Capacitors: Coupling Capacitors - To use a transistor circuit to amplify or otherwise process an ac signal, the signal source must be connected to the circuit input. If the source is directly…
Biasing Transistor Switching Circuits: Direct-Coupled Switching Circuit - When a transistor is used as a Biasing Transistor Switching Circuits, it is either biased off to IC = 0, or biased on to its maximum collector…
Bias Circuit Thermal Stability: VBE and ICBOÂ Variations - Many transistor circuits are required to operate over a wide temperature range. So, another aspect of bias circuit stability is Bias Circuit Thermal Stability, or how stable…
Bias Circuit Design: Bias Circuit Design can be amazingly simple. Usually, it is just a matter of determining the required voltage across each resistor and the appropriate current levels. Then, the resistor values are calculated…
BJT Bias Circuit Troubleshooting: Voltage Measurement - When a BJT Bias Circuit Troubleshooting is constructed in a laboratory situation, the supply voltage (VCC) and the voltage levels at the transistor terminals (VC, VBÂ and VE) should…
Comparison of Different Biasing Circuits: The Comparison of Different Biasing Circuits of the three basic bias circuits, it must be recalled that transistor manufacturers specify maximum and minimum hFEÂ values for each transistor type number at…
Voltage Divider Bias Circuit: Circuit Operation - Voltage Divider Bias Circuit, also known as emitter current bias, is the most stable of the three basic transistor bias circuits. A voltage divider bias circuit is shown…
Collector to Base Bias Circuit: The Collector to Base Bias Circuit shown in Fig. 5-17(a) has the base resistor (RB) connected between the transistor collector and base terminals. As will be demonstrated, this circuit has…
Base Bias in BJT: Circuit Operation and Analysis - The transistor bias arrangement shown in Fig. 5-12 is known as Base Bias in BJT and also as fixed current bias. The base current is a…
DC Load Line of BJT Biasing Circuit: The DC Load Line of BJT Biasing Circuit is a straight line drawn on the transistor output characteristics. For a common-emitter (CE) circuit, the load line is a…
