Patent ID: 7599631

Claim:
A burst optical receiver, comprising: an optical signal inlet adapted for receiving a burst optical signal; an optical-electrical signal converter electrically connected with said optical signal inlet to transform said burst optical signal into an electric signal; an AC coupling network which is electrically communicated with said optical-electrical signal converter, and shifts said baseline of said electric signal to the middle of said electric signal, wherein said AC coupling network comprises a first, a second, and a third high pass single-time-constant (STC) circuitries; an integrator positive feedback network which is electrically communicated with said AC coupling network, and recurrently modifies said electric signal from said AC coupling network in such a manner to eliminate distortion introduced by said AC coupling network; a pre-amplifying network electrically connecting between said optical-electrical signal converter and said AC coupling network, wherein said pre-amplifying network, which comprises a signal pre-amplifier, is to amplify said electric signal as converted from said optical-electrical signal converter to a predetermined current level for AC coupling by said AC coupling network; and a buffer amplifying network electrically connecting between said AC coupling network and said integrator positive feedback network, wherein said buffer amplifying network, which comprises a buffer amplifier, is adapted to limit said big signal of said burst signal packets and amplify said small signal of said burst signal packets before entering into said integrator positive feedback network, wherein said first high pass STC circuitry of said AC coupling network is electrically connected between said optical-electrical signal converter and said pre-amplifying network, and adapted to perform AC-coupling before said electric signal is fed into said pre-amplifying network, said second high pass STC circuitry of said AC coupling network is electrically connected between said pre-amplifying network and said buffer amplifying network through a regular signal output of said pre-amplifier, said third high pass STC circuitry of said AC coupling network is electrically connected between said pre-amplifying network and said buffer amplifying network through a complementary signal output of said pre-amplifier, in such a manner that said electric signal from said complementary output is in reverse phase of said electric signal from a positive output, and to bring a transfer function between said pre-amplifying network and an electric signal outlet into a real variable function.