Amplifiers – With semiconductor amplifying device – Including combined diverse-type semiconductor device
Patent
1986-09-10
1989-01-31
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including combined diverse-type semiconductor device
330255, 330264, 330293, H03F 345
Patent
active
048018937
ABSTRACT:
Improved forward transimpedance amplifiers are provided using a field effect transistor first amplification stage, direct coupled to a bipolar junction transistor second amplification stage. In some embodiments an optional third bipolar junction transistor amplification stage is provided, direct coupled from the second stage. Negative feedback signals are connected from the output of the bipolar junction transistor stage to the input of the field effect transistor stage. The invention provides simple and low-cost amplifiers with very high forward transimpedance and other performance characteristics approaching those of an ideal amplifier, permitting the realization of a nearly ideal transimpedance amplifier with performance characteristics dominated by its feedback network.
REFERENCES:
patent: 4420724 (1983-12-01), Owen
patent: 4553108 (1985-11-01), Young
Roberts et al., "Instrument Output Amplifier", Wireless World, Mar. 1969.
Roberts et al., "M.O.S.-Bipolar Amplifiers," Wireless World, Jul. 1969, pp. 328-330.
Sedon, "A Universal Spectrometric Preamplifier", Instruments and Experimental Techniques, vol. 19, No. 1, Pt. 2, pp. 153-154, Jan.-Feb. 1976 (Publ. Aug. 1976).
Mullins James B.
Perandi Aado J.
Umeda David H.
VanAlstine Frank L.
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