Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent
1991-04-11
1992-07-14
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including differential amplifier
330308, 330311, H03F 345
Patent
active
051306670
ABSTRACT:
A wideband transimpedance amplifier utilizing a differential amplifier circuit structure whereby the differential pair is bridged by a signal detector which, as an example, would be a photodetector when the transimpedance amplifier is employed within a optical receiver. In order to bias the signal detector the differential pair is operated asymmetric with respect to the DC voltage but the circuit maintains a symmetric AC response to the signal detector current input. The circuit is designed to operate at the unity gain frequency. The signal detector is placed between the source (or emitter) electrodes of the transistors which helps to reduces the impact of gate (or base) capacitance on circuit response speed. These factors combined maximize the bandwidth capabilities of circuit. The circuit is responsive to a current input to produce two voltage outputs equal in magnitude but opposite in phase.
REFERENCES:
patent: 4594562 (1986-06-01), Gurke et al.
"Optical Receiver Amplifier Front End for Diffuse Infrared Communication", IBM Technical Disclosure Bulletin, vol. 29, No. 8, Jan. 1987, pp. 3720, 3721.
Wyland, "Fet Cascade Technique Optimizes Differential Amplifier Performance", Electronics, Jan. 18, 1971, pp. 81-84.
"A Wide-Band Low-Noise Monolithic Transimpedance Amplifier", Meyer & Blauschild, IEEE, vol. SC-21, No. 4, Aug. 1986, pp. 530-533.
"New Monolithic AGC Amplifier Stabilising Output DC Level for 560 Mbit/s Optical Transmission", Kinoshita et al., Electronics Letters, vol. 22, No. 8, Apr. 1986.
"A 1.5 Gbit/sGaAs Four-Channel Selector LSI w/Monolithically Integrated Newly Structured GaAs Ohmic Contact MSM Photodetector & Laser Driver", Tamanaka & Takada, IEEE, vol. 1, Oct. 1989, pp. 310-312.
"A 3 GHz Transimpedance OEIC Receiver for 1.3-1.55 .mu.m Fiber-Optic Systems", Chang et al., IEEE, vol. 2, No. 3, Mar. 1990, pp. 197-199.
"A 2 Gb/s Throughput GaAs Digital Time Switch LSI using LSCFL", Takada et al., IEEE, vol. MTT-33, No. 12, Dec. 1985, pp. 1579-1584.
"A Highly Integrated 20 MBIT/S GaAs Optical Receiver for Use in TPON Network Termination Equipment", Back et al., Electronic Letters, Apr. 1991.
Chang Gee-Kung
Gimlett James L.
Liu Ting-Ping
Bell Communications Research Inc.
Mullins James B.
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