Mixed Quiz (See related pages) 1 The supply voltage (VDD) for a JFET forces free electrons to flow from the source to the drain. A) True B) False 2 The JFET is a current-controlled device because an input current controls an output voltage. A) True B) False 3 The source and drain terminals are not interchangeable at high frequencies. A) True B) False 4 In the schematic symbol for a p-channel JFET, the gate arrow points in. A) True B) False 5 Gate bias is not the best way to bias a JFET in the active region because with gate bias the Q point is unstable. A) True B) False 6 The unit mho is the ratio of voltage to current and the modern unit for mho is the joule. A) True B) False 7 A JFET common-source amplifier produces an inverted output that is coupled from the drain. A) True B) False 8 A JFET analog switch operates in the active region. A) True B) False 9 A JFET chopper can be used to build an ac amplifier. A) True B) False 10 Circuits that amplify frequencies down to 0 Hz are called amplifiers. 11 A circuit that generates an ac signal is a(n) . 12 Since the field-effect transistor depends on only one type of charge, it is referred to as . 13 The is an amplifying device that is preferred for most linear applications. 14 The JFET is a -controlled device. 15 The minimum JFET voltage VP is called voltage. 16 When the JFET operates in only the ohmic region or in the cutoff region, it is being used as an analog . 17 A JFET circuit that converts a dc input voltage to a square-wave output is a(n) . 18 What is a circuit that steers one or more of the input signals to the output line? A) dc amplifier B) regulator C) oscillator D) multiplexer 19 A stage that isolates the preceding stage from the following stage is called a A) chopper amplifier B) driver amplifier C) buffer amplifier D) preamplifier 20 In audio applications, JFETs are often used as A) analog switches B) tuned RF amplifiers C) common-source amplifiers D) source followers 21 Which instrument cannot be used in the testing of a JFET? A) curve tracer B) oscilloscope C) watt meter D) DMM 22 The current flowing from the JFET’s source to drain must pass through what between the depletion layers? A) gate B) ground C) channel D) base 23 The almost-vertical part of the drain curve below pinchoff is called the A) static region B) channel C) ohmic region D) saturation 24 Self-biasing a JFET is used only with A) small-signal amplifiers B) power amplifiers C) wideband amplifiers D) tuned RF amplifiers 25 The JFET source follower has A) low input resistance B) high voltage gain C) a voltage gain less than one D) the output taken from the drain
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