Key Facts from Reading Chapter 1
From Class Wiki
The following facts are not profound and are possibly very obvious. Nonetheless, they might help cement certain concepts. Please add things you think would be helpful.
- Conduction in n-type material is from free electrons.
- Conduction in p-type material is from holes (positive particles).
- The function of metal-oxide-semiconductor field-effect transistors (MOSFETs) depends on the voltage applied to the gate.
- Certain ranges of voltage allow no current to flow between the drain and the source. In this way, the MOSFET acts like an open switch.
- Another particular range of voltage allows current to easily flow from the source to the drain.
- When the voltage is in between the ranges of open and closed switch, the MOSFET can smoothly control the amount of current flowing.
- Bipolar Junction Transistors (BJTs) can act as either switches or current controls as well.
- An inverting amplifier has a negative voltage gain, .
- A noninverting amplifier has a positive voltage gain, . (If you get this, you deserve a cookie)
- The power gain,, is the ration of the output power to the input power
- is the amplifier's input resistance and is the amplifier's output resistance.
- Power gain, , can be converted to decibels:
- By the equation above, we can say voltage gain in decibels can be found with this equation: , where is the voltage gain and is the voltage gain is decibels.
- Similarly, we can say current gain in decibels can be found with this equation: , where is the current gain and is the current gain in decibels.
- Differential Amplifiers have two inputs. The terminal marked with a "+" is the noninverting input, and the terminal marked with a "-" is the inverting input.
- The differential input signal is given by
- The output of an ideal differential amplifier is given by .
- The common-mode input signal is given by the following: .
- A real differential amplifier's output is given by , where is the common-mode signal gain.
- The sentence that says "voltage gain and is the voltage gain is decibels." I think you mean "in decibels." Other than that nice work!