1) Why is opamp called a direct coupled (dc coupled) amplifier ?
2) A normal voltage or curent amplifier provides power gain...then why do we go for power amplifiers for increased power ? cant we use a cascaded amplifier stage to achieve the required power ?
3) How is the digital ground different from analog ground ?
4) How is a cmos inverter an amplifier ?

 

have you gone thru the ebooks on this forum? check it out you have your answers there.

moz

 

1) Why is opamp called a direct coupled (dc coupled) amplifier ?
2) A normal voltage or curent amplifier provides power gain...then why do we go for power amplifiers for increased power ? cant we use a cascaded amplifier stage to achieve the required power ?
3) How is the digital ground different from analog ground ?
4) How is a cmos inverter an amplifier ?

As a suggestion, why don't you give us what you think are the answers to these questions and we can help you from there. Learning on here is a two way process.

Dave