US6573802B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single-ended to differential and differential to single-ended conversion using a common mode shunt
Assignee: Quarterhill Inc
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Filing: 2001-08-31
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Granted: 2003-06-03
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Expires: 2021-08-31
Abstract
Abstract A single-ended to differential converter including a common mode shunt and a load element. The common mode shunt includes first and second reactive elements each having first ends coupled together at a common mode junction. The second end of the first reactive element receives a single-ended input signal referenced to a reference signal, such as ground. The common mode shunt further includes a third reactive element coupled between the common mode junction and ground. The load element is coupled between the second end of the second reactive element and ground. A single-ended input signal is applied at a second end of the first reactive element and the differential signal is developed by the first and second reactive elements. The common mode shunt serves as a differential to single-ended converter by applying the differential signal as an input in which a single-ended output signal develops at the load element.
Inventors
- 👤 A. Michael Straub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:38
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/38; H03H7/40
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
101 words
A common mode shunt configured as a single-ended to differential converter, comprising: first and second reactive elements, each having a first end coupled together at a common mode junction; the first reactive element including a second end that receives a single-ended input signal referenced to a reference signal and that develops a first polarity of a differential output signal; the second reactive element including a second end that develops a second polarity of the differential output signal; and a third reactive element having a first end coupled to the common mode junction and a second end referenced to the reference signal.
Claim 2
Dependent Claim
101 words
A common mode shunt configured as a single-ended to differential converter, comprising: first and second reactive elements, each having a first end coupled together at a common mode junction; the first reactive element including a second end that receives a single-ended input signal referenced to a reference signal and that develops a first polarity of a differential output signal; the second reactive element including a second end that develops a second polarity of the differential output signal; and a third reactive element having a first end coupled to the common mode junction and a second end referenced to the reference signal.
Claim 3
Dependent Claim
30 words
The single-ended to differential converter of claim 1 , further comprising: an input source, coupled to the second end of the first reactive element, that develops the single-ended input signal.
Claim 4
Dependent Claim
32 words
The single-ended to differential converter of claim 2 , wherein the input source includes a series-coupled input impedance element having one end coupled to the second end of the first reactive element.
Claim 5
Dependent Claim
55 words
The single-ended to differential converter of claim 3 , further comprising: a load element having a first end coupled to the second end of the second reactive element and a second end referenced to the reference signal; and wherein the load element and the series-coupled input impedance element are resistors having approximately the same resistance.
Claim 6
Dependent Claim
37 words
The single-ended to differential converter of claim 1 , further comprising: a load element having a first end coupled to the second end of the second reactive element and a second end referenced to the reference signal.
Claim 7
Dependent Claim
31 words
The single-ended to differential converter of claim 5 , wherein the second end of the third reactive element and the second end of the load element are each coupled to ground.
Claim 8
Dependent Claim
32 words
The single-ended to differential converter of claim 1 , wherein the first and second reactive elements of the common mode shunt are inductors and wherein the third reactive element is a capacitor.
Claim 9
Dependent Claim
21 words
The single-ended to differential converter of claim 7 , wherein the first and second inductors each have approximately the same inductance.
Claim 10
Dependent Claim
26 words
The single-ended to differential converter of claim 1 , wherein the first and second reactive elements of the common mode shunt have approximately the same impedance.
Claim 11
Dependent Claim
33 words
The single-ended to differential converter of claim 1 , wherein first and second reactive elements have an impedance of approximately Z, and wherein the third reactive element has an impedance of approximately −0.5Z.
Claim 12
Dependent Claim
32 words
The single-ended to differential converter of claim 1 , wherein the first and second reactive elements of the common mode shunt are capacitors and wherein the third reactive element is an inductor.
Claim 13
Dependent Claim
96 words
A common mode shunt configured as a differential to single-ended converter, comprising: first and second reactive elements, each having a first end coupled together at a common mode junction; the first reactive element including a second end that receives a first polarity of a differential input signal; the second reactive element including a second end that receives a second polarity of the differential input signal and that develops a single-ended output signals; and a third reactive element having a first end coupled to the common mode junction and a second end referenced to the reference signal.
Claim 14
Dependent Claim
96 words
A common mode shunt configured as a differential to single-ended converter, comprising: first and second reactive elements, each having a first end coupled together at a common mode junction; the first reactive element including a second end that receives a first polarity of a differential input signal; the second reactive element including a second end that receives a second polarity of the differential input signal and that develops a single-ended output signals; and a third reactive element having a first end coupled to the common mode junction and a second end referenced to the reference signal.
Claim 15
Dependent Claim
37 words
The single-ended to differential converter of claim 12 , further comprising: a load element having a first end coupled to the second end of the second reactive element and a second end referenced to the reference signal.
Claim 16
Dependent Claim
31 words
The single-ended to differential converter of claim 13 , wherein the second end of the third reactive element and the second end of the load element are each coupled to ground.
Claim 17
Dependent Claim
32 words
The single-ended to differential converter of claim 12 , wherein the first and second reactive elements of the common mode shunt are inductors and wherein the third reactive element is a capacitor.
Claim 18
Dependent Claim
21 words
The single-ended to differential converter of claim 15 , wherein the first and second inductors each have approximately the same inductance.
Claim 19
Dependent Claim
26 words
The single-ended to differential converter of claim 12 , wherein the first and second reactive elements of the common mode shunt have approximately the same impedance.
Claim 20
Dependent Claim
32 words
The single-ended to differential converter of claim 12 , wherein the first and second reactive elements of the common mode shunt are capacitors and wherein the third reactive element is an inductor.
Claim 21
Dependent Claim
18 words
The single-ended to differential converter of claim 12 , wherein the differential input signal comprises current-based polarity signals.
Claim 22
Dependent Claim
22 words
The single-ended to differential converter of claim 12 , wherein the differential input signal is developed by a differential pair of transistors.
Claim 23
Dependent Claim
47 words
The single-ended to differential converter of claim 12 , wherein the first and second reactive elements each have an impedance of approximately Z, further comprising: a fourth reactive element having an impedance of approximately −2Z coupled between the second ends of the first and second reactive elements.
Claim 24
Independent Claim
73 words
A method of employing a common mode shunt as a single-ended to differential converter, the common mode shunt including first, second and third reactive elements coupled together at a common mode junction and wherein the third reactive element is coupled to a reference signal, the method comprising: applying a single-ended signal, referenced to the reference signal, to the first reactive element; and receiving a differential signal across the first and second reactive elements.
Claim 25
Independent Claim
73 words
A method of employing a common mode shunt as a single-ended to differential converter, the common mode shunt including first, second and third reactive elements coupled together at a common mode junction and wherein the third reactive element is coupled to a reference signal, the method comprising: applying a single-ended signal, referenced to the reference signal, to the first reactive element; and receiving a differential signal across the first and second reactive elements.
Claim 26
Dependent Claim
21 words
The method of claim 22 , further comprising: coupling a load element between the reference signal and the second reactive element.
Claim 27
Independent Claim
73 words
A method of employing a common mode shunt as a differential to single-ended converter, the common mode shunt including first, second and third reactive elements coupled together at a common mode junction and wherein the third reactive element is coupled to a reference signal, the method comprising: applying a differential signal across the first and second reactive elements; and receiving a single-ended signal, referenced to the reference signal, from the second reactive element.
Claim 28
Independent Claim
73 words
A method of employing a common mode shunt as a differential to single-ended converter, the common mode shunt including first, second and third reactive elements coupled together at a common mode junction and wherein the third reactive element is coupled to a reference signal, the method comprising: applying a differential signal across the first and second reactive elements; and receiving a single-ended signal, referenced to the reference signal, from the second reactive element.
Claim 29
Dependent Claim
21 words
The method of claim 24 , further comprising: coupling a load element between the reference signal and the second reactive element.
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| 3.5 Years (Year 4) | 2006-06-02 | 2006-12-02 | 2007-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-06-02 | 2010-12-02 | 2011-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-06-02 | 2014-12-02 | 2015-06-03 | $7700.00 | Window Closed / Lapsed |