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US 2004/0164806 A1Published application
Amplifier circuit for am broadcasting
AssigneeNiigata Seimitsu Co., Ltd.
InventorsTakeshi Ikeda, Hiroshi Miyagi
Life of this patent
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Abstract
An amplifier circuit for AM broadcasting for amplifying an inputted AM broadcast signal by an FET and outputting it. The amplifier circuit comprises FETs for signal amplification which are P-channel MOSFETs (4, 5) of relatively small flicker noise. While suppressing the flicker noise to a lowest possible level, more circuits including the RF amplifier for AM broadcasting can be integrated on one chip, thereby realizing small size and low noise of the circuits.
Claims4
An amplifier circuit suitable for amplifying an am broadcast signal, the circuit comprising:
- FET means for amplifying the AM broadcast signal and reducing a flicker noise level in the amplifier below an N-MOS transistor equivalent flicker noise;
- and
- a tuning circuit operatively connected between the FET means and an output node of the amplifier circuit.
Dependencies are inferred from the claim text.