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Multi-data rate, burst-mode transimpedance amplifier (TIA) circuit

a transimpedance amplifier and multi-data technology, applied in the direction of transmission, electromagnetic transmission, gain control, etc., can solve the problems of higher optical power budget, higher loss of pon networks, and low data rate of multi-data ra

Active Publication Date: 2018-02-01
AVAGO TECH INT SALES PTE LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are multiple challenges in designing burst-mode PON Receivers.
PON networks suffer from higher losses and hence require higher optical power budgets.
To achieve such low Rx sensitivity values, the TIA needs to either have very low input-referred noise or very high gain, both of which are difficult requirements to meet.
Another challenge in designing burst-mode PON receivers is that they need to have a wide dynamic range (typically greater than around 22 db for 10 G EPON) due to the higher optical power budget requirement.
Another challenge in designing burst-mode PON receivers is enabling the receiver to perform burst-mode synchronization very quickly.
Yet another challenge in designing today's burst-mode PON receivers is that they have to be capable of supporting multiple data rate operations.

Method used

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  • Multi-data rate, burst-mode transimpedance amplifier (TIA) circuit

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Embodiment Construction

[0014]In accordance with illustrative embodiments, a burst-mode TIA circuit for use in PON receivers is provided that supports multiple data rates, has high receiver sensitivity, wide dynamic range, and that performs burst-mode synchronization very quickly. A few illustrative embodiments of the burst-mode TIA circuit will now be described with reference to the FIGS. 1-5, in which like reference numerals represent like elements, features or components.

[0015]In accordance with an illustrative, or exemplary, embodiment, the multi-rate burst-mode TIA circuit has a high-speed data path that is made up of only first and second gain stages, which leads to the TIA circuit having very low input-referred noise. The first gain stage is a single-ended resistive feedback network that includes a rate select switch. Based on the chosen data rate at which the multi-rate burst-mode TIA circuit will operate, the rate select switch selects an appropriate feedback resistor of the resistive feedback net...

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Abstract

A burst-mode TIA circuit for use in PON receivers is provided that supports multiple data rates, has high receiver sensitivity, wide dynamic range, and that performs burst-mode synchronization very quickly. The multi-rate burst-mode TIA circuit has a high-speed data path that has low input-referred noise. Based on the chosen data rate at which the multi-rate burst-mode TIA circuit will operate, the rate select switch selects an appropriate feedback resistor of the resistive feedback network.

Description

TECHNICAL FIELD OF THE INVENTION[0001]The invention relates to transimpedance amplifier (TIA) circuits. More particularly, the invention relates to a multi-data rate, burst-mode TIA circuit for fiber to the home (FTTH) applicationsBACKGROUND OF THE INVENTION[0002]A typical optical receiver (Rx) includes at least one photodiode that detects an optical signal and converts it into an electrical current signal and at least one transimpedance amplifier (TIA) that converts the electrical current signal into an electrical voltage signal. The photodetector, which is typically a P-intrinsic-N (PIN) photodiode, produces an electrical current signal in response to light detected by the photodetector. The TIA converts this electrical current signal into an output voltage signal having some gain, commonly referred to as transimpedance gain. The TIA circuit typically includes several control loops for improving performance, such as a direct current (DC) offset correction loop, an automatic gain c...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H03G3/30H04B10/61H04B1/16H03F3/45
CPCH03G3/3084H03F3/45278H04B10/616H04B1/16H03F2203/45212H03F2203/45288H03F2200/78H04B10/693H04B10/6931H03F3/45475H04B10/69
Inventor SHRINGARPURE, RAHULASMANIS, GEORGIOSCHAAHOUB, FAOUZIGUPTA, KARTIKEYA
Owner AVAGO TECH INT SALES PTE LTD
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