Amplifiers – With semiconductor amplifying device – Including atomic particle or radiant energy impinging on a...
Reexamination Certificate
2000-02-29
2001-11-27
Pascal, Robert (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including atomic particle or radiant energy impinging on a...
C250S297000
Reexamination Certificate
active
06323734
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a method and/or architecture for implementing a trans-impedance amplifier (TIA) generally and, more particularly, to a TIA that may provide a trans-impedance for an optical detector diode.
BACKGROUND OF THE INVENTION
Conventional TIA circuits implement AC coupling and external biasing. AC coupling comprises a number of additional capacitors. External biasing comprises a number of additional resistors. There are many disadvantages to conventional TIA circuits. Conventional TIA circuits require a large capacitance (i.e., capacitors) for AC coupling. The larger capacitors are too large for integrated circuit implementation and therefore require external coupling capacitors. Conventional TIA circuits require low value biasing resistors, resulting in implementation of external bias resistors. Conventional TIA circuits provide poor power supply and substrate noise rejection. Furthermore, conventional TIA circuits often present an “under shoot” condition since the output signal is always in one direction (a single ended output signal).
SUMMARY OF THE INVENTION
The present invention concerns an apparatus comprising a detector circuit and a first circuit. The detector circuit may be configured to (i) detect a bias voltage and (ii) generate a plurality of first signals and a plurality of second signals. The first circuit may be configured to (a) present (i) the bias signal and (ii) a differential signal in response to the plurality of first signals and the plurality of second signals and (b) control (i) one or more of the plurality of first signals and (ii) one or more of the plurality of second signals.
The objects, features and advantages of the present invention include providing an architecture and/or method that may provide (i) a trans-impedance gain for a detector diode signal, (ii) a DC bias required for the diode, (iii) a differential input to maximize signal to power supply, and/or (v) substrate noise.
The present invention may also provide an architecture and/or method that may provide an optical diode detector with (i) a reverse bias of several volts to minimize junction capacitance, (ii) a very low input impedance load to minimize an RC time constant of the optical diode parasitic capacitance and input resistance and/or (iii) a wide dynamic range (e.g., 80 dB) from 200 nAmps to 2 mA.
REFERENCES:
patent: 5561288 (1996-10-01), Stevens
patent: 5570221 (1996-10-01), Fujita
patent: 5892609 (1999-04-01), Saruwatari
patent: 5955918 (1999-09-01), Uno
patent: 5982232 (1999-11-01), Rogers
patent: 5990737 (1999-11-01), Czarmul et al.
Bandwidth Enhancement of Transimpedance Amplifier by a Capacitive-Peaking Design, By Feng-Tso Chien and Yi-Jen Chan, IEEE Journal of Solid-State Circuits, vol. 34, No. 8, Aug. 1999, pp. 1167-1170.
A CMOS Optical Preamplifier for Wireless Infrared Communications, By Khoman Phang and David A. Johns, IEEE Transactions on Circuits and Systems-II: Analog and Digital Signal Processing, vol. 46, No. 7, Jul. 1999, pp. 852-859.
Wide-Band Integrated Optical Receiver with Improved Dynamic Range Using a Current Switch at the Input, By L.A.D. van den Broeke and A. J. Nieuwkerk, IEEE Journal of Solid-State Circuits, vol. 28, No. 7, Jul. 1993, pp. 862-854.
A Wideband Low-Noise Variable-Gain BiCMOS Transimpedance Amplifier, By Robert G. Meyer and William D. Mack, IEEE Journal of Solid-State Circuits, vol. 29, No. 6, Jun. 1994, pp. 701-706.
A. 1.06Gb/s-32dBm to 0dBm BiCMOS Optical Preamplifier Featuring Adaptive Transimpedance, By Haideh Khorramabadi et al., ISSCC95/Session 3/Analog Techniques/Paper WP3.4, 1995.
Henrion W. S.
Kruczkowski Phillip J.
Sen Subhajit
Cypress Semiconductor Corp.
Maiorana P.C. Christopher P.
Nguyen Khanh Van
Pascal Robert
LandOfFree
Trans-impedance amplifier does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Trans-impedance amplifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Trans-impedance amplifier will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2612301