CMOS: Because in CMOS circuit one transistor is always off, the quiescent power consumption is product of supply voltage and leakage current and is typically very low in microwatt range (μW).

Correct Option: C

CMOS: Because in CMOS circuit one transistor is always off, the quiescent power consumption is product of supply voltage and leakage current and is typically very low in microwatt range (μW).

Don't know or Don't care is the meaning of 'X' in digital.

Correct Option: A

Don't know or Don't care is the meaning of 'X' in digital.

Because switching time of logic circuit in ECL is improved by estabilising one of the two states in active region instead of saturation region of transistor. The other state remains in cut-off region. This eliminates the problem of storage time and hence ECL is extremely fast with propagation delay time of 1ns (approx).

Correct Option: B

Because switching time of logic circuit in ECL is improved by estabilising one of the two states in active region instead of saturation region of transistor. The other state remains in cut-off region. This eliminates the problem of storage time and hence ECL is extremely fast with propagation delay time of 1ns (approx).

1 GHz. This high frequency is achieved by preventing the cross-coupled transistors from entering into the saturation region.

Correct Option: D

1 GHz. This high frequency is achieved by preventing the cross-coupled transistors from entering into the saturation region.

A parity check usually can detect only one bit error.

Correct Option: A

A parity check usually can detect only one bit error.