Amplifier stage

H - Electricity – 03 – F

Patent

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Details

330/20

H03F 3/45 (2006.01)

Patent

CA 1184257

ABSTRACT OF THE DISCLOSURE An improved amplifier of the type comprising bipo- lar transistor means coupled between the input terminal of the amplifier and a differential pair of transistors. Compensation means is provided for generating a compensating signal through the bipolar transistor means such that the bipolar transistor means and compensation means reduce the amount of bias current drawn from the input signal to the amplifier. Other aspects of the present invention include the pro- vision of reducing DC offset voltages between each side of the differential amplifier due to the operation of the device with its input terminals at different voltage levels, and the provision of a zero in the transfer characteristics of the amplifier to mitigate the effects of poles provided in the transfer characteristics.

391144

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