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  • How is saturation defined for a bipolar transistor?
    The physics definition has both emitter-base and collector-base junctions forward biased In piece-wise linear analysis, the characteristics are approximated by straight lines
  • What is the meaning of biasing in electrical electronics circuits?
    Your question is ambiguous, but I will answer one possible case, namely, "Why might someone apply a DC bias to a BJT?" An NPN BJT does not conduct very much current when the base-to-emitter voltage (Vbe) is less than 0 7V Typically, a base biasing network for a BJT is used to bring the base into the 'forward active region', where changes in voltage at the base translate into changes in
  • terminology - What does the term bias mean? - Electrical Engineering . . .
    Bias is another word for the operating point -- a dc voltage or current about which the instantaneous value might vary For example, you can say you applied a "6 V peak-peak AC signal biased at +1 V" In this case the range of the signal would be from -2 to +4 V You can see the relationship with the everyday meaning of bias, "a tendency or inclination" (dictionary com) in this case with the
  • What does Bias Repeatability tell me in an IMUs spec sheet?
    Alternatively, this spec sheet (for this tactical grade IMU) describes its bias repeatability with this footnote: Bias repeatability provides an estimate for long-term drift in the bias, as observed during 500 hours of high temperature operating life at +105C This seems to estimate the change in bias over a single 500-hour run So if I leave my gyro on for 500 hours after bias correction, I
  • Selecting biasing resistor values for MAX3485
    And all bias resistors reduce the amount of devices you can connect to bus If you have a specific bus which requires the use of bias resistors by definition, the resistor values are also defined in the bus specification The pull-up on TE #RE pins will mean the MCU jams the bus at boot until your firmware initializes the IO pin
  • Common mode voltage concept in circuit analysis
    Common mode voltage is the mean of the two input voltages; that's it's definition when applied to differential amplifiers @ludicrous <-- it's not an arbitrary definition; it's a very important definition that allows you to model and understand what happens when you try have a signal voltage relative to it's local ground scheme and, you need to transfer that signal to a system with a remote
  • Whats the essence of saturation of a BJT? Whats happening inside a . . .
    The forward bias of the Vbc > 0 V allows electrons in an NPN to flow from C to B, but it also allows opposite carriers (holes in an NPN) to flow from B to C This creates a "parasitic" base-to-collector current that shunts the hFE gain rapidly causing Vce to never reach 0 volts as hFE reduces to 10 =Ic Ib then < 1
  • analog - What is Q-point of transistor? - Electrical Engineering Stack . . .
    From Wiki: The operating point of a device, also known as bias point, quiescent point, or Q-point, is the steady-state voltage or current at a specified terminal of an active device (a transistor or vacuum tube) with no input signal applied The choice of Q-point depends on the application and is a crucial part of the design process
  • transistors - BJT: definition of edge of saturation - Electrical . . .
    The 0 4 V value is not so much a definition but an observation This is from onsemi's BC547 datasheet: In the active region, the curve is almost vertical; in the saturation region, the curve is almost horizontal; and there is a region in between The exact value of V CE where the saturation region begins varies, and is different for other transistors When you need the transistor to output a
  • Photodiode operating modes - confusion about wording
    Also, 4 uses the definition of the PV mode of 1 and 2 to talk about PC mode with just zero volts reverse bias In other words, where 1 and 2 talk about PV mode, 4 calls it one special variant of PC mode





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