Q. A digital system is required to amplify a binary encoded audio signal. The user should be able to control the gain of the amplifier from a minimum to a maximum in 100 increments. The minimum number of bits required to encode, in straight binary is,

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Q. A 4 bit transistor register has output voltage of high-low-high-low. The binary number stored and its decimal equivalent are

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Q. Assertion (A): A demultiplexer cannot be used as a decoder

Reason (R): A multiplexer selects one of many outputs whereas a decoder selects on output corresponding to coded input.

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Q. Hexadecimal number F is called to octal number

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Q. A 4 bit ripple counter is in 0000 state. The clock pulses are applied and then removed. The counter reads 0011. The number of clock pulses which have occurred are

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Q. TTL logic is preferred to DRL logic because

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Q. Assertion (A): Schottky transistors are preferred over normal transistors in digital circuits

Reason (R): A Schottky transistor when used as a switch, between cutoff and active region.

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Q. A 4 bit synchronous counter uses flip flops with a delay time of 15 ns each. The time required for change of state is

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Q. What do the contents of instruction register specify?

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Q. In the decimal number 27, the digital 2 represents

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Q. Which of the following is true?

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Q. E7F6₁₆ = __________ .

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Q. What is the normal range of analog input voltage?

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Q. Assertion (A): The propagation delay in ECL is minimum

Reason (R): Transistors used in ECL switch between active and cutoff regions.

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Q. For the design of a sequential circuit having 9 states, minimum number of memory elements required is

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Q. ICs are

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Q. A 6 bit DAC uses binary weighted resistors. If MSB resistor is 20 k ohm, the value of LSB resistor is

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Q. A 6 bit dual slope A/D converter uses a reference of -6v and a 1 MHz clock. It uses a fixed count of 40 (101000). Then, what will be input, if the output register shows 100111 at the end of conversion.

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Q. The number of accumulators in 6800 are

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Q. A 14 pin AND gate IC has __________ AND gates.

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