Assertion (A): An ac amplifier uses coupling capacitors at input and output

Reason (R): The capacitive reactance varies inversely with frequency. It is infinite for dc

Assertion (A): SSB and ISB receivers have good S/N ratio

Reason (R): SSB and ISB receivers have good suppression of adjacent channels.

Match the following:

1. It increases system gain
2. It improves sensitivity
3. It improves system stability

1. Acceptor level lies close the valence band.
2. Donor level lies close to the valence band.
3. n type semiconductor behaves as an insulator at 0 K.
4. p type semiconductor behaves as an insulator at 0 K.

Match the following:

Assertion (A): Power drain of CMOS increases with operating frequency

Reason (R): All unused CMOS inputs should be tied either to a fixed voltage level (0 or V_DD) or to another input.