3RD YEAR SEMESTER 1 SUPPLEMENTARY JUNE 2010 JNTU B.TECH ENGINEERING QUESTION PAPER - LINEAR IC APPLICATIONS

Code No:  RR310404                     RR           Set No.   2

 

 

III  B.Tech I Semester Supplementary Examinations,June 2010

LINEAR IC  APPLICATIONS Electronics And Communication Engineering

Time: 3 hours                                                                                  Max Marks:  80

Answer any FIVE Questions

All  Questions carry equal marks

? ? ? ? ?

 

 

1.   (a)  Define a filter?How are filters classified?

(b)  Obtain  the  frequency  response plot  for a band  rejection  filter having  fH   =

200Hz and fL  =1KHz.  Label the gain and frequency axes.                       [8+8]

 

2.   (a)  What  are the different linear IC packages?

(b)  What  is the input  impedance of a non-inverting  op-amp amplifier?

(c)  Design an inverting  amplifier with an input  resistance of 10KΩ and a gain of

-5.                                                                                                                 [5+5+6]

 

3.   (a)  Show the  standard representation of IC voltage  regulator.   List and  explain

the characteristics of three terminal  IC regulator.

(b)  Draw the characteristics of an ideal comparator and that  of a commercial

comparator.                                                                                                  [8+8]

 

4.   (a)  Explain  the  basic  technique  utilized  in  Digital  to  Analog  conversion  using

suitable  mathematical expressions.

(b)  In an inverted  R-2R ladder type Digital to Analog Converter  R=  10kΩ ,VREF

= + 20 volts.   Find  the  current  in each  20 kΩ resister  and  the  maximum

current passing into the feedback resistor of the op-amp.                          [8+8]

 

5.   (a)  Draw the dc voltage versus phase difference characteristic of balanced  modu-

lator phase detector  of a PLL indicating  all important regions.

(b)  Draw the dc out put voltage of VCO versus frequency characteristic of a PLL

indicating  the capture  and lock range clearly.

(c)  State  the relationship  between lock range and capture  range through  a math-

ematical expression.                                                                                   [6+6+4]

 

6.   (a)  Draw a neat circuit diagram of an a.c inverting amplifier. What  are the major advantages  and disadvantages of a single-supply a.c amplifier.

(b)  In an AC inverting  amplifier circuit

Rin=50Ω, Ci = 0.1µf, R1  = 100KΩ. Rf  = 1KΩ,R2  = 10KΩ and Vcc  = ±15V.

determine  the band width of the amplifier.                                                 [8+8]

 

7.   (a)  Explain the operation  of a dual slope type Analog to Digital converter.

(b)  A dual slope Analog to Digital converter uses a 16-bit counter and operates at

4MHz clock rate.  The maximum  input  voltage is +8volts.   Find the value of integrator resistor 'R' if the maximum output voltage of the integrator

is-6 volts after 2n  counts for an integrator capacitor  of 0.1µF.                 [8+8]

 

 

1

Code No:  RR310404                     RR           Set No.   2

 

 

8.   (a)  Define the  conditions  on the  feedback circuit  of an amplifier to convert  it in to an oscillator.

 

(b)  Design an RC phase shift oscillator for 300HZ frequency using IC µA 741 and

±15 Volt power supplies.  Assume necessary component values.

 

(c)  Suggest a method to reduce the output voltage swing to ±6.5 Volts.  [6+6+4]

 

 

? ? ? ? ?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

Code No:  RR310404                     RR           Set No.   4

 

 

III  B.Tech I Semester Supplementary Examinations,June 2010

LINEAR IC  APPLICATIONS Electronics And Communication Engineering

Time: 3 hours                                                                                  Max Marks:  80

Answer any FIVE Questions

All  Questions carry equal marks

? ? ? ? ?

 

 

1.   (a)  Define a filter? How are filters classified?

 

(b)  Obtain  the  frequency  response plot  for a band  rejection  filter having  fH   =

200Hz and fL  =1KHz.  Label the gain and frequency axes.                       [8+8]

 

2.   (a)  Explain the operation  of a dual slope type Analog to Digital converter.

 

(b)  A dual slope Analog to Digital converter uses a 16-bit counter and operates at

4MHz clock rate.  The maximum  input  voltage is +8volts.   Find the value of

integrator resistor 'R' if the maximum output voltage of the integrator

is-6 volts after 2n  counts for an integrator capacitor  of 0.1µF.                 [8+8]

 

3.   (a)  Draw the dc voltage versus phase difference characteristic of balanced  modu- lator phase detector  of a PLL indicating  all important regions.

(b)  Draw the dc out put voltage of VCO versus frequency characteristic of a PLL

indicating  the capture  and lock range clearly.

 

(c)  State  the relationship  between lock range and capture  range through  a math- ematical expression.                                                                                   [6+6+4]

 

4.   (a)  What  are the different linear IC packages?

 

(b)  What  is the input  impedance of a non-inverting  op-amp amplifier?

 

(c)  Design an inverting  amplifier with an input  resistance of 10KΩ and a gain of

-5.                                                                                                                 [5+5+6]

 

5.   (a)  Draw a neat circuit diagram of an a.c inverting amplifier. What  are the major advantages  and disadvantages of a single-supply a.c amplifier.

(b)  In an AC inverting  amplifier circuit

Rin=50Ω, Ci = 0.1µf, R1  = 100KΩ. Rf  = 1KΩ,R2  = 10KΩ and Vcc  = ±15V.

determine  the band width of the amplifier.                                                 [8+8]

 

6.   (a)  Show the  standard representation of IC voltage  regulator.   List and  explain

the characteristics of three terminal  IC regulator.

 

(b)  Draw the characteristics of an ideal comparator and that  of a commercial comparator.                                                                                                  [8+8]

 

7.   (a)  Define the  conditions  on the  feedback circuit  of an amplifier to convert  it in to an oscillator.

(b)  Design an RC phase shift oscillator for 300HZ frequency using IC µA 741 and

±15 Volt power supplies.  Assume necessary component values.

 

 

3

Code No:  RR310404                     RR           Set No.   4

 

 

(c)  Suggest a method to reduce the output voltage swing to ±6.5 Volts.  [6+6+4]

 

8.   (a)  Explain  the  basic  technique  utilized  in  Digital  to  Analog  conversion  using suitable  mathematical expressions.

(b)  In an inverted  R-2R ladder type Digital to Analog Converter  R=  10kΩ ,VREF

= + 20 volts.   Find  the  current  in each  20 kΩ resister  and  the  maximum

current passing into the feedback resistor of the op-amp.                          [8+8]

 

 

? ? ? ? ?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

Code No:  RR310404                     RR           Set No.   1

 

 

III  B.Tech I Semester Supplementary Examinations,June 2010

LINEAR IC  APPLICATIONS Electronics And Communication Engineering

Time: 3 hours                                                                                  Max Marks:  80

Answer any FIVE Questions

All  Questions carry equal marks

? ? ? ? ?

 

 

1.   (a)  Explain  the  basic  technique  utilized  in  Digital  to  Analog  conversion  using

suitable  mathematical expressions.

 

(b)  In an inverted  R-2R ladder type Digital to Analog Converter  R=  10kΩ ,VREF

= + 20 volts.   Find  the  current  in each  20 kΩ resister  and  the  maximum

current passing into the feedback resistor of the op-amp.                          [8+8]

 

2.   (a)  Show the  standard representation of IC voltage  regulator.   List and  explain the characteristics of three terminal  IC regulator.

 

(b)  Draw the characteristics of an ideal comparator and that  of a commercial

comparator.                                                                                                  [8+8]

 

3.   (a)  Define a filter?How are filters classified?

 

(b)  Obtain  the  frequency  response plot  for a band  rejection  filter having  fH   =

200Hz and fL  =1KHz.  Label the gain and frequency axes.                       [8+8]

 

4.   (a)  Draw a neat circuit diagram of an a.c inverting amplifier. What  are the major

advantages  and disadvantages of a single-supply a.c amplifier. (b)  In an AC inverting  amplifier circuit

Rin=50Ω, Ci = 0.1µf, R1  = 100KΩ. Rf  = 1KΩ,R2  = 10KΩ and Vcc  = ±15V.

determine  the band width of the amplifier.                                                 [8+8]

 

5.   (a)  Draw the dc voltage versus phase difference characteristic of balanced  modu- lator phase detector  of a PLL indicating  all important regions.

 

(b)  Draw the dc out put voltage of VCO versus frequency characteristic of a PLL

indicating  the capture  and lock range clearly.

 

(c)  State  the relationship  between lock range and capture  range through  a math-

ematical expression.                                                                                   [6+6+4]

 

6.   (a)  Define the  conditions  on the  feedback circuit  of an amplifier to convert  it in

to an oscillator.

 

(b)  Design an RC phase shift oscillator for 300HZ frequency using IC µA 741 and

±15 Volt power supplies.  Assume necessary component values.

 

(c)  Suggest a method to reduce the output voltage swing to ±6.5 Volts.  [6+6+4]

 

7.   (a)  Explain the operation  of a dual slope type Analog to Digital converter.

 

 

 

 

5

Code No:  RR310404                     RR           Set No.   1

 

 

(b)  A dual slope Analog to Digital converter uses a 16-bit counter and operates at

4MHz clock rate.  The maximum  input  voltage is +8volts.   Find the value of integrator resistor 'R' if the maximum output voltage of the integrator

is-6 volts after 2n  counts for an integrator capacitor  of 0.1µF.                 [8+8]

 

8.   (a)  What  are the different linear IC packages?

 

(b)  What  is the input  impedance of a non-inverting  op-amp amplifier?

 

(c)  Design an inverting  amplifier with an input  resistance of 10KΩ and a gain of

-5.                                                                                                                 [5+5+6]

 

 

? ? ? ? ?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6

Code No:  RR310404                     RR           Set No.   3

 

 

III  B.Tech I Semester Supplementary Examinations,June 2010

LINEAR IC  APPLICATIONS Electronics And Communication Engineering

Time: 3 hours                                                                                  Max Marks:  80

Answer any FIVE Questions

All  Questions carry equal marks

? ? ? ? ?

 

 

1.   (a)  Explain the operation  of a dual slope type Analog to Digital converter.

 

(b)  A dual slope Analog to Digital converter uses a 16-bit counter and operates at

4MHz clock rate.  The maximum  input  voltage is +8volts.   Find the value of

integrator resistor 'R' if the maximum output voltage of the integrator

is-6 volts after 2n  counts for an integrator capacitor  of 0.1µF.                 [8+8]

 

2.   (a)  Define a filter?How are filters classified?

 

(b)  Obtain  the  frequency  response plot  for a band  rejection  filter having  fH   =

200Hz and fL  =1KHz.  Label the gain and frequency axes.                       [8+8]

 

3.   (a)  What  are the different linear IC packages?

 

(b)  What  is the input  impedance of a non-inverting  op-amp amplifier?

 

(c)  Design an inverting  amplifier with an input  resistance of 10KΩ and a gain of

-5.                                                                                                                 [5+5+6]

 

4.   (a)  Draw a neat circuit diagram of an a.c inverting amplifier. What  are the major

advantages  and disadvantages of a single-supply a.c amplifier.

 

(b)  In an AC inverting  amplifier circuit

Rin=50Ω, Ci = 0.1µf, R1  = 100KΩ. Rf  = 1KΩ,R2  = 10KΩ and Vcc  = ±15V. determine  the band width of the amplifier.                                                 [8+8]

 

5.   (a)  Define the  conditions  on the  feedback circuit  of an amplifier to convert  it in to an oscillator.

(b)  Design an RC phase shift oscillator for 300HZ frequency using IC µA 741 and

±15 Volt power supplies.  Assume necessary component values.

 

(c)  Suggest a method to reduce the output voltage swing to ±6.5 Volts.  [6+6+4]

 

6.   (a)  Explain  the  basic  technique  utilized  in  Digital  to  Analog  conversion  using

suitable  mathematical expressions.

 

(b)  In an inverted  R-2R ladder type Digital to Analog Converter  R=  10kΩ ,VREF

= + 20 volts.   Find  the  current  in each  20 kΩ resister  and  the  maximum

current passing into the feedback resistor of the op-amp.                          [8+8]

 

7.   (a)  Draw the dc voltage versus phase difference characteristic of balanced  modu- lator phase detector  of a PLL indicating  all important regions.

(b)  Draw the dc out put voltage of VCO versus frequency characteristic of a PLL

indicating  the capture  and lock range clearly.

 

 

7

Code No:  RR310404                     RR           Set No.   3

 

 

(c)  State  the relationship  between lock range and capture  range through  a math- ematical expression.                                                                                   [6+6+4]

 

8.   (a)  Show the  standard representation of IC voltage  regulator.   List and  explain the characteristics of three terminal  IC regulator.

 

(b)  Draw the characteristics of an ideal comparator and that  of a  commercial comparator.                                                                                                  [8+8]