Question 3 (a) With the aid of schematic diagrams, explain the structure, operating principle and characteristics of a N channel JFET. N GPP INT S (b) In a self-bias n-channel JFET as shown in Figure 3, the operating point is to be set at ID - 1.5 mA and VDS-10 V. The JFET parameters are Ipss 5 mA and Vos(om)=-2 V. ww RD J1 J310 RG RS Figure 3 VDD 20 V + (i) Find the values of RS and RD. (ii) Why connect resistor RG in series with the gate of the JFET?

Shown below is a section from the datasheet of 74LS32, a quad 2-input OR chip. What is the noise margin high (in V) of this chip? Limits Symbol Parameter Min Typ Max Unit VIH Input HIGH Voltage 2.0 V VIL Input LOW Voltage V 0.8 VIK Input Clamp Diode Voltage -0.65 -1.5 V V VOH Output HIGH Voltage 3.5 V V VOL Output LOW Voltage 0.35 0.5 V 20 μA IH Input HIGH Current 0.1 mA IIL Input LOW Current -0.4 mA los Short Circuit Current (Note 1) -100 mA Power Supply Current Icc 6.2 Total, Output HIGH mA Total, Output LOW 9.8 74 74 74 2.7 -20

Compute the complete (input & output) characteristics of n-channel JFET in the form of curves.The JFET has typical parameters as IDSS=12mA and VGS(off)= -5V.

Offset voltage compensating network is connected in between pin number .......... &.. of LM741 op-amp .... O 1 and 4 O 1 and 5 O 2 and 3 O 4 and 7

The controlling parameter in MOSFET is a) Vds b) lg c) Vgs d) Is

The arrow on the symbol of MOSFET indicates O a. that it is a N-channel MOSFET O b. the direction of conventional current flow O c. that it is a P-channel MOSFET O d. the direction of electrons

4. Line Regulation is determined by: a. Load current b. Changes in the load resistance and output voltage C. Changes in output and input voltage below deta

2- Determine the resolution for each of the following D/A converters:(a) 4– bit (b) 6– bit (c) 18 – bit

4. An RC filter stage (R = 33 0, C = 120 HF) is used to filter a signal of 24 V dc with 2 V rms operating from a full wave rectifier. Calculate the percentage ripple at the output of the RC Section for a 100-mA load. Also calculate the ripple of the filtered signal applied to the RC stage. *****END*****

For the BJT circuit shown in Figure b, find the operation point of the transistor. (use B=100 for BJT) Rc 9 k2 Vcc= 2.5 V Rp1 k2 Maximum file size: 51 Files