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logseq/bak/pages/E6C/2025-05-01T20_36_51.625Z.Desktop.md

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+E6C Digital ICs: families of digital ICs; gates; programmable logic devices
+
+- [[E6C01]] (A)
+What is the function of hysteresis in a comparator? #card
+	- [[A.]] To prevent input noise from causing unstable output signals
+	- [[B.]] To allow the comparator to be used with AC input signals
+	- [[C.]] To cause the output to continually change states
+	- [[D.]] To increase the sensitivity
+--
+- [[E6C02]] (B)
+What happens when the level of a comparator’s input signal crosses the threshold voltage? #card
+	- [[A.]] The IC input can be damaged
+	- [[B.]] The comparator changes its output state
+	- [[C.]] The reference level appears at the output
+	- [[D.]] The feedback loop becomes unstable
+--
+- [[E6C03]] (A)
+What is tri-state logic? #card
+	- [[A.]] Logic devices with 0, 1, and high-impedance output states
+	- [[B.]] Logic devices that utilize ternary math
+	- [[C.]] Logic with three output impedances which can be selected to better match the load impedance
+	- [[D.]] A counter with eight states
+--
+- [[E6C04]] (C)
+Which of the following is an advantage of BiCMOS logic? #card
+	- [[A.]] Its simplicity results in much less expensive devices than standard CMOS
+	- [[B.]] It is immune to electrostatic damage
+	- [[C.]] It has the high input impedance of CMOS and the low output impedance of bipolar transistors
+	- [[D.]] All these choices are correct
+--
+- [[E6C05]] (D)
+Which of the following digital logic families has the lowest power consumption? #card
+	- [[A.]] Schottky TTL
+	- [[B.]] ECL
+	- [[C.]] NMOS
+	- [[D.]] CMOS
+--
+- [[E6C06]] (C)
+Why do CMOS digital integrated circuits have high immunity to noise on the input signal or power supply? #card
+	- [[A.]] Large bypass capacitance is inherent
+	- [[B.]] The input switching threshold is about twice the power supply voltage
+	- [[C.]] The input switching threshold is about half the power supply voltage
+	- [[D.]] Bandwidth is very limited
+--
+- [[E6C07]] (B)
+What best describes a pull-up or pull-down resistor? #card
+	- [[A.]] A resistor in a keying circuit used to reduce key clicks
+	- [[B.]] A resistor connected to the positive or negative supply used to establish a voltage when an input or output is an open circuit
+	- [[C.]] A resistor that ensures that an oscillator frequency does not drift
+	- [[D.]] A resistor connected to an op-amp output that prevents signals from exceeding the power supply voltage
+--
+- [[E6C08]] (B)
+In Figure E6-3, which is the schematic symbol for a NAND gate? #card
+	- [[A.]] 1
+	- [[B.]] 2
+	- [[C.]] 3
+	- [[D.]] 4
+--
+- [[E6C09]] (B)
+What is used to design the configuration of a field-programmable gate array (FPGA)? #card
+	- [[A.]] Karnaugh maps
+	- [[B.]] Hardware description language (HDL)
+	- [[C.]] An auto-router
+	- [[D.]] Machine and assembly language
+--
+- [[E6C10]] (D)
+In Figure E6-3, which is the schematic symbol for a NOR gate? #card
+	- [[A.]] 1
+	- [[B.]] 2
+	- [[C.]] 3
+	- [[D.]] 4
+--
+- [[E6C11]] (C)
+In Figure E6-3, which is the schematic symbol for the NOT operation (inversion)? #card
+	- [[A.]] 2
+	- [[B.]] 4
+	- [[C.]] 5
+	- [[D.]] 6