Electronics-Thyristors and Tranducers
Electronics-Thyristors and Tranducers
21. Three different points are shown on a dc load line. The upper point represents the
- minimum current gain
- quiescent point
- saturation point
- cutoff point
22. Which of the following conditions are needed to properly bias an npn transistor amplifier?
- Forward bias the base/emitter junction and reverse bias the base/collector junction.
- Forward bias the collector/base junction and reverse bias the emitter/base junction.
- Apply a positive voltage on the n-type material and a negative voltage on the p-type material.
- Apply a large voltage on the base.
23. Often a common-collector will be the last stage before the load; the main function of this stage is to
- provide voltage gain
- buffer the voltage amplifiers from the low-resistance load
- provide phase inversion
- provide a high-frequency path to improve the frequency response
24. In order for feedback oscillators to have any practical value, the gain has to be
- < 1
- self-adjusting
- stabilized
- nonlinear
25. To get a negative gate-source voltage in a self-biased JFET circuit, you must use a
- voltage divider
- source resistor
- ground
- negative gate supply voltage
27. If the drain, source, and channel of a MOSFET are all a p-type material, and it operates in both modes, this is an n-channel D-MOSFET.
- TRUE
- FALSE
28. A practical CE amplifier has the input on the base and the output taken off the emitter.
- TRUE
- FALSE
29. Base currents are usually small because of the physical construction of the thin and lightly doped base.
- TRUE
- FALSE