Transistors and Applications Questions

• Often a common-collector will be the last stage before the load; the main function of this stage is to
• A JFET
• To get a negative gate-source voltage in a self-biased JFET circuit, you must use a
• A source follower has a voltage gain (Av) of
• Three different points are shown on a dc load line. The upper point represents the
• In order for feedback oscillators to have any practical value, the gain has to be
• The capacitor that produces an ac ground is called a(n)
• The depletion-mode MOSFET
• In a class B push-pull amplifier, the transistors are biased slightly above cutoff to avoid
• The primary function of the bias circuit is to
• The formula used to calculate the approximate ac resistance of the base-emitter diode (re) is
• Which of the following conditions are needed to properly bias an npn transistor amplifier?
• The signal voltage gain of an amplifier, Av, is defined as:
• A certain amplifier has a voltage gain of 210. That gain expressed in decibels is 46.4 dB.
• A decrease in base current of a CE amplifier causes the voltage measured between the emitter and the collector to increase.
• Base currents are usually small because of the physical construction of the thin and lightly doped base.
• The beta of a BJT is the ratio of collector current to emitter current.
• A practical CE amplifier has the input on the base and the output taken off the emitter.
• An essential requirement of a feedback oscillator is a phase shift around the feedback loop of 360°.
• In an n-type JFET, current will flow when a positive voltage is applied to the drain and a negative voltage is applied to the source.