RADAR Principles
RADAR Principles
Circuits-2
In the circuit shown in Fig. 8A4, U5 pins 1 and 4 are high and both are in the reset state. Assume one clock cycle occurs of Clk A followed by one cycle of Clk B. What are the output states of the two D-type flip flops?
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If more light strikes the photodiode in Fig. 8A5, there will be:
Photodiode resistance drops when light strikes the diode, so more current flows and Answer C. is the right one.
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In the circuit shown in Fig. 8A6, which of the following is true?
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What is the correct value of RS in Fig. 8A7, if the voltage across the LED is 1.9 Volts with 5 Volts applied and If max equals 40 milliamps?
If If(max) = 40mA and V = 5V - 1.9V = 3.1V, then according to Ohms Law:
V = I x R
so:
R = V / I
R = 3.1V / 0.04A
R = 77Ω
Answer C. is the right answer.
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The block diagram of a typical RADAR system microprocessor is shown in Fig. 8A2. Choose the most correct statement regarding this system.
Answer A. is right because General Registers can contain, inter alia, address pointers.
Answer A. is wrong because the ALU - Arithmetic Logic Unit is used for arithmetic
Answer B. is wrong because General Registers are not used for arithemtic.
Answer C. is wrong because the Control Unit synchronizes the internal components of a microprocessro but does not perform arithmetic operations.
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You are troubleshooting a component on a printed circuit board in a RADAR system while referencing the Truth Table in Fig. 8A8. What kind of integrated circuit is the component?
The IC - Integrated Circuit is a FLip-Flop because when the input Dn goes High the corresponding output Q-Bar goes Low and flipping back and forth from High to Low and Low to High is what Flip-Flops are meant to do.
The Dn input stands for the nth Data input, so it's a D-Type Flip-Flop and this means the right answer is A.
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