Signal amplifier device
AssigneeSony Semiconductor Solutions Corporation
InventorYoshikatsu JINGU
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Abstract
A signal amplifier device is provided to ensure the continuity of the gain of an amplifier. The signal amplifier device includes a main path and a sub path connected in parallel to the main path. A main path first amplifier circuit amplifies an input signal on the main path. A main path second amplifier circuit includes a common-gate transistor connected in series with an output of the main path first amplifier circuit without sharing a DC current. On the main sub path, the sub path amplifier circuit amplifies the input signal by using a gain lower than the maximum gain in the main path.
Claims10
A signal amplifier device comprising:
- a main path first amplifier circuit that amplifies an input signal on a main path;
- a main path second amplifier circuit including a common-gate transistor connected in series to an output of the main path first amplifier circuit without sharing a DC current;
- and
- a sub path amplifier circuit that amplifies, on a sub path connected in parallel to the main path, the input signal by using a gain lower than a maximum gain on the main path.
Dependencies are inferred from the claim text.