E6A10
CIRCUIT COMPONENTS · Semiconductor materials and devices: semiconductor materials; bipolar junction transistors; operation and types of field-effect transistors
E6A10E6A →
In Figure E6-1, which is the schematic symbol for an N-channel dual-gate MOSFET?
- A2
- B4
- C5
- D6
Why A dual-gate MOSFET symbol shows two separate gate leads drawn as short bars that do not touch the channel line, since the gates are insulated from the channel by an oxide layer. Channel polarity is read from the substrate (body) arrow: on an N-channel device the arrow points inward, toward the channel; on a P-channel device it points outward. Symbol 4 is the one with two insulated gate bars and the inward-pointing substrate arrow, so it is the N-channel dual-gate MOSFET.
Watch out The other dual-gate symbol in the figure is the same device drawn with the substrate arrow reversed, which makes it the P-channel version; symbols with the gate touching the channel line are JFETs, not MOSFETs.
Two floating gate bars = dual-gate MOSFET; arrow poiNting iN = N-channel.
HamSandwich explanation, first draft. The question and answers are the NCVEC text.
The rest of E6A
- E6A01 In what application is gallium arsenide used as a semiconductor material?
- E6A02 Which of the following semiconductor materials contains excess free electrons?
- E6A03 Why does a PN-junction diode not conduct current when reverse biased?
- E6A04 What is the name given to an impurity atom that adds holes to a semiconductor crystal structure?
- E6A05 How does DC input impedance at the gate of a field-effect transistor (FET) compare with that of a bipolar tra…
- E6A06 What is the beta of a bipolar junction transistor?
- E6A07 Which of the following indicates that a silicon NPN junction transistor is biased on?
- E6A08 What is the term for the frequency at which the grounded-base current gain of a bipolar junction transistor h…
- E6A09 What is a depletion-mode field-effect transistor (FET)?
- E6A10 In Figure E6-1, which is the schematic symbol for an N-channel dual-gate MOSFET?
- E6A11 In Figure E6-1, which is the schematic symbol for a P-channel junction FET?
- E6A12 What is the purpose of connecting Zener diodes between a MOSFET gate and its source or drain?