Multiband equalizer, error rate measurement system using the same, error rate measurement device, and path selection method

• US 9,768,993 B2
• Filed: 10/13/2016
• Issued: 09/19/2017
• Est. Priority Date: 12/11/2015
• Status: Active Grant

• Current Assignee: Anritsu Corporation
• Original Assignee: Anritsu Corporation
• Inventors: Minami, Takanari, Saito, Sumio
• Primary Examiner(s): Perez, James M
• Application Number:
  US15/292,846
• Publication Number:
  US 20170171001A1
• Time in Patent Office: 341 Days
• Field of Search: 375219-236, 375259-285, 375295-352, 333 171- 173, 333 18
• CPC Class Codes: H04L 1/203 Details of error rate determination, e.g. BER, FER or WER
• CPC Class Codes: H04L 1/242 by comparing a transmitted test signal with a locally generated replica
• CPC Class Codes: H04L 25/03878 Line equalisers; line build-out devices
• CPC Class Codes: H04L 27/01 Equalisers baseband equalizers at the transmitter end H04L25/03343; in analogue transmission systems H04B3/04, H04B7/005
• CPC Class Codes: H04L 45/14 Routing performance; Theoretical aspects

Abstract

A plurality of high-frequency components 12 that are provided in parallel between an input-side transmission circuit 10 and an output-side transmission circuit 11 and have pass characteristics different from each other are included, each high-frequency component 12 includes a power supply terminal 17 to which a driving power supply signal is selectively input, a signal transmitted through the input-side transmission circuit 10 is transmitted to the output-side transmission circuit 11 via a transmission path including only the high-frequency component in which the driving power supply signal is input to the power supply terminal 17 among the plurality of high-frequency components 12, and at least one of the plurality of high-frequency components 12 function as an equalizer that changes a frequency characteristic of the signal input to the input-side transmission circuit 10 due to the driving power supply signal being input to the power supply terminal 17.

Claims

1. A multiband equalizer, comprising:

an input-side transmission circuit having one end at which an input terminal to which a signal is input is formed, and the other end terminated by the input-side termination circuit;

an output-side transmission circuit having one end terminated by an output-side termination circuit and the other end at which an output terminal for outputting a signal is formed;

a plurality of high-frequency components that are provided in parallel between the input-side transmission circuit and the output-side transmission circuit and have frequency pass characteristics different from each other, each high-frequency component including a power supply terminal to which a driving power supply signal is selectively input from an external power supply circuit; and

a transmission path that transmits a signal transmitted through the input side transmission circuit to the output side transmission circuit and that includes only the high-frequency component in which the driving power supply signal is input to the power supply terminal among the plurality of high-frequency components.

2. The multiband equalizer according to claim 1,

wherein at least one of the plurality of high-frequency components functions as an equalizer that changes frequency characteristics of the signal input from the input terminal due to the driving power supply signal being input to the power supply terminal thereof.

3. The multiband equalizer according to claim 1,

wherein one of the plurality of high-frequency components functions as an amplifier that amplifies a signal input from the input terminal with flat frequency characteristics.

4. The multiband equalizer according to claim 2,

wherein the high-frequency component functioning as an equalizer includes a continuous time linear equalizer (CTLE).

5. An error rate measurement system, comprising:

the multiband equalizer according to claim 1;

a pulse pattern generation device that generates a pulse pattern and inputs the pulse pattern as a test signal to a target under test; and

an error rate measurement device that is disposed at a subsequent stage of the multiband equalizer, and compares a measured signal from the target under test due to an input of the test signal with the test signal to measure an error rate of the measured signal,

wherein the error rate measurement device includes a power supply circuit that inputs a driving power supply signal to the plurality of power supply terminals of the multiband equalizer, and

the measured signal is input to the error rate measurement device via the high-frequency component in which the driving power supply signal is input to the power supply terminal among the plurality of high-frequency components.

6. An error rate measurement device, comprising:

the multiband equalizer according to claim 1;

an error rate measurement unit that is disposed at a subsequent stage of the multiband equalizer, and compares a measured signal from the target under test due to an input of a pulse pattern as a test signal with the test signal to measure an error rate of the measured signal; and

a power supply circuit that inputs a driving power supply signal to the plurality of power supply terminals of the multiband equalizer,

wherein the measured signal is input to the error rate measurement unit via the high-frequency component in which the driving power supply signal is input to the power supply terminal among the plurality of high-frequency components.

7. A path selection method of a multiband equalizer having an input-side transmission circuit having one end at which an input terminal to which a signal is input is formed, and the other end terminated by the input-side termination circuit;

an output-side transmission circuit having one end terminated by an output-side termination circuit and the other end at which an output terminal for outputting a signal is formed;

a plurality of high-frequency components that are provided in parallel between the input-side transmission circuit and the output-side transmission circuit and have frequency pass characteristics different from each other, each high-frequency component including a power supply terminal to which a driving power supply signal is selectively input from an external power supply circuit; and

a transmission path that transmits a signal transmitted through the input side transmission circuit to the output side transmission circuit and that includes only the high-frequency component in which the driving power supply signal is input to the power supply terminal among the plurality of high-frequency components, the method comprising;

a step (S1) of selecting at least one high-frequency component from among the plurality of high-frequency components of the multiband equalizer; and

a step (S2) of inputting the driving power supply signal to the power supply terminal that the high-frequency component selected in step (S1) has.