High-speed transmission line receiver with wide range of common

Amplifiers – With semiconductor amplifying device – Including differential amplifier

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330258, H03F 345

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active

057011028

ABSTRACT:
A high-speed transmission line receiver includes a basic differential amplifier stage along with a gain enhancement stage, which is generally similar to the differential amplifier stage. One of the current mirror transistors in the gain enhancement stage is connected to one of the current mirror transistors in the basic amplifier stage in such a way that the magnitude of the differential current at the output of the basic amplifier stage is increased, thereby increasing the gain of the receiver without increasing its output capacitance or the time constant of the output signal. Preferably, the transistors in the gain enhancement stage are larger than the transistors in the basic amplifier stage. Increasing the gain of the line receiver reduces the distortion which may occur as a result of the failure of the line receiver to reach a clamping voltage as the common mode of the differential input signal is increased.

REFERENCES:
patent: 5063305 (1991-11-01), Minami et al.
patent: 5276369 (1994-01-01), Hayakawa et al.
De La Plaza et al. "Power Supply Rejection in Differential Switche-Capacitor Filters", IEEE Journal of Solid-State Circuits, vol. SC-19, No. 6, Dec. 1984 pp. 912-918.

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