base voltage การใช้

• :It's probably because it's really a multiple of a base voltage.
• The emitter base junction is unchanged because the emitter base voltage is the same.
• As this base voltage increases, current begins to flow in the collector of Q1.
• V base1 and V base2 are the base voltages on sides 1 and 2.
• Computer models such as those used in SPICE use the collector base voltage " V"
• Some models base the collector current correction factor on the collector base voltage " V"
• Its collector-base voltage is zero as shown.
• The R 1-R 2 voltage divider conveys this change to the Q2 base voltage and it begins conducting.
• Typically, the collector voltage will be higher than the base voltage, and Schottky diode will be reverse biased.
• Its collector voltage goes down and Q2 begins going cut-off, because the voltage divider now provides lower Q2 base voltage.
• R3 and R4 then act as a voltage divider that makes Q1's base voltage negative and consequently turns off Q1.
• CC is due to the Early effect, which causes the ? of the transistor to change with its collector-to-base voltage " V"
• In a grounded-emitter transistor circuit, such as the light-switch circuit shown, as the base voltage rises, the emitter and collector currents rise exponentially.
• The Q2 base voltage is determined by the mentioned divider so that Q2 is conducting and the trigger output is in the low state.
• Some basic circuits can be designed by assuming that the emitter base voltage is approximately constant, and that collector current is beta times the base current.
• Another modification was introduced to address this issue, using three separate guns, each fed with a different base voltage tuned to hit one of the layers.
• In this circuit, the voltage divider holds the base voltage fixed independent of base current provided the divider current is large compared to the base current.
• In this case, the base voltage divider is usually connected to the transistor's collector rather than V CC, providing negative feedback that stabilizes I E and I C.
• In the present circuit, if the input voltages change in the same direction, the negative feedback makes Q3 / Q4 base voltage follow ( with 2 " V"