Broadband active coupling method and device
AssigneeCiena Corporation
InventorsYuriy Greshishchev, Aravinthan Vigneswaran
Life of this patent
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Abstract
Described are broadband active coupling circuits and methods. A broadband active coupling circuit includes a high-pass circuit configured to provide a high frequency response for a broadband signal and a low-pass circuit connected in parallel with the high-pass circuit. The low-pass circuit is configured to provide a low frequency response for the broadband signal, where the low-pass circuit includes an active circuit configured to minimally impact the high frequency response provided by the high-pass circuit.
Claims20
A broadband active coupling circuit comprising:
- a high-pass circuit configured to provide a high frequency response for a broadband signal;
- and
- a low-pass circuit connected in parallel with the high-pass circuit, the low-pass circuit configured to provide a low frequency response for the broadband signal,
- wherein the low-pass circuit includes an active circuit configured to not impact the high frequency response provided by the high-pass circuit.
A method for broadband active coupling, the method comprising:
- passing, from a transmitter to a receiver via a high-pass channel, upper band frequencies of a broadband signal, the upper band frequencies starting from a first high-pass corner frequency up to higher frequencies;
- and
- passing, from the transmitter to the receiver via a low-pass channel provided in parallel to the high-pass channel, lower band frequencies of the broadband signal, the lower band frequencies starting at or near the first high-pass corner frequency down to a second high-pass corner frequency,
- wherein the low-pass channel includes active components configured to isolate processing by the low-pass channel on the high-pass channel.
A system comprising:
- a transmitter circuit configured to transmit a broadband signal;
- a receiver circuit configured to receive the broadband signal via a transmission line;
- and
- a two-channel coupling circuit configured to interface between the transmitter circuit and the receiver circuit, the two-channel coupling circuit comprising
- an upper band channel configured to pass frequencies from the broadband signal starting from an upper band corner frequency up to higher frequencies;
- and
- a lower band channel connected in parallel to the upper band channel, the lower band channel configured to pass frequencies starting at or near the upper band corner frequency down to a lower band corner frequency,
- wherein the lower band channel includes active circuitry configured to mitigate impact on passing of the frequencies by the upper band channel.
Dependencies are inferred from the claim text.