Downlead cable

Patent metadata

Field	Value
Publication number	US-11917093-B2
Application number	US-202118005997-A
Country	US
Kind code	B2
Filing date	Jul 29, 2021
Priority date	Jul 31, 2020
Publication date	Feb 27, 2024
Grant date	Feb 27, 2024

Abstract

A downlead cable includes a first connector configured to connect to a headset of a communication system. A second connector is configured to connect to a connection port of a handset or a radio system. The downlead cable further includes wires connecting the first and second connectors and a cable jacket encapsulating the wires. A transformer is wired inline between the first and second connectors. The transformer is configured to enable the headset to mimic the electrical characteristics a microphone which the handset or the radio system is configured to interface.

First claim

What is claimed is:

1. A downlead cable, comprising:
a first connector configured to connect to a headset of a communication system;
a second connector configured to connect to a connection port of a handset or a radio system;
at least one wire connecting the first and second connectors;
a cable jacket encapsulating the wires; and
a transformer wired inline between the first and second connectors, the transformer configured to enable the headset to mimic electrical characteristics of a microphone which the handset or the radio system is configured to interface,
wherein the transformer has a turn ratio in a range from 20:1 to 25:1.

2. The downlead cable of claim 1 , wherein the first connector is selected from a group consisting of a U174 connector, an Amphenol Terrapin connector, a Nexus AP136 type connector, and an ODU/LEMO type connector.

3. The downlead cable of claim 1 , wherein the second connector is a Fischer connector.

4. The downlead cable of claim 1 , wherein the transformer has a power rating in a range from 50 mW to 80 mW at 300 Hz.

5. The downlead cable of claim 1 , wherein the transformer has a primary source impedance in a range from 1.4 kΩCT to 1.8 kΩCT.

6. The downlead cable of claim 1 , wherein the transformer has a secondary load impedance in a range from 2.8Ω to 3.6Ω.

7. The downlead cable of claim 1 , wherein the transformer has a frequency response relative to 1 kHz in a range from ±2 dB to ±4 dB.

8. The downlead cable of claim 1 , wherein the transformer has a primary coil DC resistance in a range from 200Ω to 250Ω.

9. The downlead cable of claim 1 , wherein the transformer has a secondary coil DC resistance in a range from 0.7Ω to 1.3Ω.

10. The downlead cable of claim 1 , wherein the transformer is disposed proximal to the first connector relative to the second connector.

11. The downlead cable of claim 1 , wherein the downlead cable has a length in a range from 15 inches to 30 inches.

12. A downlead cable, comprising:
a first connector configured to connect to a headset of a communication system;
a second connector configured to connect to a connection port of a handset or a radio system;
at least one wire connecting the first and second connectors;
a cable jacket encapsulating the wires; and
a transformer overmolded on the downlead cable between the first and second connectors, the transformer configured to enable the headset to mimic electrical characteristics of a microphone which the handset or the radio system is configured to interface, the transformer being disposed proximal to the first connector relative to the second connector,
wherein the transformer has a turn ratio in a range from 20:1 to 25:1.

13. The downlead cable of claim 12 , wherein the first connector has 10 pins and the second connector has 4 pins.

14. The downlead cable of claim 12 , wherein the transformer has a primary source impedance in a range from 1.4 kΩCT to 1.8 kΩCT, and a secondary load impedance in a range from 2.8Ω to 3.6Ω.

15. The downlead cable of claim 12 , wherein the transformer has a primary coil DC resistance in a range from 200Ω to 250Ω, and a secondary coil DC resistance in a range from 0.7Ω to 1.3Ω.

16. The downlead cable of claim 12 , wherein the transformer has a frequency response relative to 1 kHz in a range from ±2 dB to ±4 dB.

17. A communication system comprising:
a headset comprising at least one audio output earcup, a controller, and a microphone;
a radio system operably connected to the headset;
a handset configured to toggle the radio system between a transmission mode and a reception mode; and
a downlead cable connecting the headset to the handset or the radio system, the downlead cable comprising a transformer configured to enable the headset to mimic electrical characteristics of a microphone which the handset or the radio system is configured to interface,
wherein the transformer has a turn ratio in a range from 20:1 to 25:1.

18. The communication system of claim 17 , wherein the microphone of the headset has an impedance of 150Ω, and the handset or the radio system are configured to interface a microphone having an impedance of 5Ω.

Assignees

• Gentex Corp

Inventors

• Hould Gregory
• Hudson Christopher

Classifications

• H04B2001/3872

  with extendable microphones or earphones · CPC title

• H04M1/6058 Primary

  involving the use of a headset accessory device connected to the portable telephone · CPC title

• H04B1/385

  Transceivers carried on the body, e.g. in helmets · CPC title

• H04R1/1033

  Cables or cables storage, e.g. cable reels (cord reels per se H02G11/02; arrangements for storing and repeatedly paying-out and re-storing lengths of conductors or cables B65H75/34; extensible conductors or cables, e.g. self-coiling cords H01B7/06) · CPC title

• H04B2001/3855

  carried in a belt or harness · CPC title