Feedback network for cascaded amplifiers
OwnerEsa Tiiliharjuinventor
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Abstract
The invention relates to a feedback network (60) for cascade amplifiers (200), which comprises an active stage (30) to feed signal back to a first internal node (65) at the output of the first amplifier stage (61) of the cascade. The invention further relates to a feedback network (60) which comprises said active feedback stage (30) with said first internal amplifier node (65) connection and a feedback resistor (10) connected from said cascade amplifier output port (out) to its input port (in).
Claims16
A feedback network (60) for a multistage amplifier, where the amplifier consists of two or more amplifier stages connected in cascade, characterized in that a feedback amplifier stage (30) is connected from circuit output to its first internal node (65) at the output of the first amplifier stage (61) of the 15 cascade.
A feedback network realization according to any of the preceding claims characterized in that one or both of the integrated dc-blocking capacitors at the cascade amplifier (200) first amplifier stage (61) input have been implemented as external, off-chip, capacitors.
A feedback network realization according to any of the preceding claims characterized in that the 25 cascade amplifier (200) is preceded by an inductive impedance element.
A feedback network realization according to any of the preceding claims characterized in that some or all of the the amplifier stages are self-biased.
A feedback network realization according to any of the preceding claims characterized in that multiple copies of the cascade amplifier (200) have been cascaded to act as an amplifying stage. 30
A feedback network realization according to any of the preceding claims characterized in that multiple copies of the cascade amplifier (200) have been connected in parallel to output to multiple output ports.
A feedback network realization according to any of the preceding claims characterized in that it has been implemented in monolithic form.
Dependencies are inferred from the claim text.