Digital Circuits & Systems

a) Design a synchronous 3-bit updown counter using J-K flip flops. 

(b) Draw the logic diagram or POS

Y = (x1+x2) (x2+x3)

Show the presence of hazard, its type and a way of removal. 

(a) Write VHDL code for 4 bit asynchronous counter.

(c) Explain different types of standard logic.

(b) Explain the difference between concurrent and sequential signal assignment.

(a) Explain Generate statement with an example.

(b) Explain inertial and transport delay using example.

(a) Write down VHDL code for full adder using structural modeling.

5. Write short note on:

b) SRAM and DRAM

5. Write short note on:

a) CMOS Logic 

b) Explain the working of flash type ADC. 

(a) Write a test bench and VHDL code for 2 bit multiplier.

b) Draw the circuit diagram of master slave J-K flip flop and explain its operation with the help of truth table. 

a) Give the comparison between PROM, PLA and PAL. 

b) Write short note on BCD to 7 segment decoder. 

a) With the help of a logic diagram and truth table explain an octal to binary encoder. 

b) Implement the following function with a MUX F(a,b,c)=m(1,3,5,6) Take 'a' and 'b' as select inputs. 

a) Draw the logic diagram of 4-bit binary parallel adder and explain operation. 

b)Make a k-map of the following expression and obtain the minimal of SOP and POS forms 

a) Reduce the following expression using k-map and implement the minimal expression in universal logic.

F=m(0,2,4,6,7,8,10,12,13,15)

b) Draw the logic diagram using only two input NAND gates to implement the following expression.

a) Reduce the expression

c) Explain critical and non-critical race.

Write VHDL code for

(c) Serial in parallel out shift register.

Write VHDL code for

(b) 4x16 decoder

Write VHDL code for

(a) SR flip flop

j) What is signature?

(i) Define test bench.

(h) What is overloading in VHDL?

(g) What are the capabilities of VHDL?

(f) What are ASM charts?

(e) How does a PLA differ from PAL?

(d) Give difference between Mealy and Moore model.

f) Write the different application of 555 timer. 

(b) Define wait statement.

(a) What are generics?

(b) What is altera's cyclone processor? Explain using any example.

(a) Define FPGA and its use in industry.

(b) Describe block diagram of any Xilinx series.

(a) Define CPLD and give its applications.

(b) Draw state machine model for the sequence 1010 and write VHDL code for that.

(a) Which command is used for dumping results into a text file? Explain with example. 

(b) What are pure and impure functions? Give difference between functions and procedures.

e) Compare between combinational and sequential circuits.

d) Design a 32:1 multiplexer using 16:1 mux and 2:1 multiplexer.

c) Show that NAND and NOR gates are universal gates.

b) What are asynchronous sequential circuits?

a) What are analog circuits? Give a few examples.