Feedback amplifier input stage circuit

A feedback amplifier comprising:

• an input stage circuit configured to receive at least one input feedback signal having wide band frequency components that include high frequency components and low frequency components, the input stage circuit including:
• a first gain stage configured to amplify the at least one input feedback signal to generate at least one amplified output signal;
• a filter configured to filter the wide band frequency components on the at least one input feedback signal to generate at least one filtered feedback signal having a first low frequency component;
• and
• a second gain stage configured to amplify the at least one filtered feedback signal having the first low frequency component and to provide at least one gain output signal;
• a collector element configured to receive the at least one amplified output signal and the at least one output gain signal having the amplified filtered first low frequency component and to generate at least one output signal based on the at the at least one amplified output signal and the at least one output gain signal;
• and
• at least one output stage configured to receive the at least one amplified output signal and to amplify the at least one amplified output signal to generate at least one final output signal.

A feedback amplifier comprising:

• an input stage circuit configured to receive at least one input feedback signal having high frequency components and low frequency components, the input stage circuit including:
• a first gain stage configured to amplify the at least one input feedback signal to generate at least one amplified output signal;
• a filter configured to filter the at least one input feedback signal to generate at least one filtered feedback signal having a first low frequency component;
• and
• a second gain stage configured to amplify the at least one filtered feedback signal having the first low frequency component and to provide at least one gain output signal;
• and
• a collector element configured to receive the at least one amplified output signal to the at least one output gain signal having the amplified filtered first low frequency component and to provide at least one output signal to at least one output stage.