US5596285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impedance adaptation process and device for a transmitter and/or receiver, integrated circuit and transmission system
Assignee: Bull SAS
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Filing: 1994-08-19
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Granted: 1997-01-21
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Expires: 2014-08-19
Abstract
Abstract An integrated circuit (IC) includes a device (10) that adapts the impedance to the characteristic impedance (Zc) of transmission lines (13) each connecting a transmitter (11) to a receiver (12). Two adaptation blocks (14, 15) reproduce the respective structures of the transmitters (11) and receivers (12) and their impedance is adapted by a reference resistor (Rr). A closed loop control device (Len, Lep, Lrn, Lrp) reproduces the adaptation conditions in the transmitters (11) and receivers (12) respectively.
Inventors
- 👤 Roland Marbot
- 👤 Jean-Claude Le Bihan
- 👤 Andrew Cofler
- 👤 Reza Nezamzadeh-Moosavi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:17
CPC Classifications
H; H03; H03H; H03H11/00; H03H11/02; H03H11/28; H03H11/30; H03K; H03K19/00; H03K19/0005; H04; H04L; H04L25/00; H04L25/02; H04L25/08
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
125 words
A process for adapting an impedance to a characteristic impedance (Zc) of a transmission line (13) that connects a transmitter (11) to a receiver (12), the transmitter having a structure (16) and generating a signal having a low level and a high level and the receiver having a structure (17) responsive to the signal, the process comprising using predetermined values for said low and high levels for the signal, reproducing the structure of the transmitter and/or receiver into a respective adaptation structure (16', 17'), connecting said adaptation structure to a reference impedance (Rr), adapting said adaptation structure to said reference impedance, and bringing (Len, Lep, Lrn, Lrp) the operation of the structure of the transmitter and/or the receiver under the control of said adaptation structure.
Claim 2
Dependent Claim
125 words
A process for adapting an impedance to a characteristic impedance (Zc) of a transmission line (13) that connects a transmitter (11) to a receiver (12), the transmitter having a structure (16) and generating a signal having a low level and a high level and the receiver having a structure (17) responsive to the signal, the process comprising using predetermined values for said low and high levels for the signal, reproducing the structure of the transmitter and/or receiver into a respective adaptation structure (16', 17'), connecting said adaptation structure to a reference impedance (Rr), adapting said adaptation structure to said reference impedance, and bringing (Len, Lep, Lrn, Lrp) the operation of the structure of the transmitter and/or the receiver under the control of said adaptation structure.
Claim 3
Dependent Claim
44 words
The process according to claim 1, characterized in that one of the two predetermined values of high and low levels is determined relative to a third predetermined value between the high and low levels and corresponding to a polarization potential (Vtt) of the receiver.
Claim 4
Dependent Claim
40 words
The process according to claim 2, characterized in that the structure (16) of the transmitter includes a CMOS inverter (Ne, Pe) having complementary transistors, and said connecting step comprises connecting said reference impedance (Rr) in series between said complementary transistors.
Claim 5
Dependent Claim
27 words
The process according to claim 3, characterized in that it consists of providing a reference impedance value that is twice that of the transmissions line's characteristic impedance.
Claim 6
Dependent Claim
85 words
The process according to claim 1, characterized in that the structure of the receiver includes a resistive bridge (17) which determines a polarization potential (Vtt), and the process further comprises using said polarization potential as a condition of operation of the receiver, said reproducing step comprises reproducing said resistive bridge into two resistive bridges (17') in said adaptation structure of the receiver, and said bringing step comprises placing said resistive bridge of the receiver under the control of said resistive bridges of said adaptation structure.
Claim 7
Dependent Claim
85 words
The process according to claim 2, characterized in that the structure of the receiver includes a resistive bridge (17) which determines said polarization potential (Vtt), and the process further comprises using said polarization potential as a condition of operation of the receiver, said reproducing step comprises reproducing said resistive bridge into two resistive bridges (17') in said adaptation structure of the receiver, and said bringing step comprises placing said resistive bridge of the receiver under the control of said resistive bridges of said adaptation structure.
Claim 8
Dependent Claim
85 words
The process according to claim 3, characterized in that the structure of the receiver includes a resistive bridge (17) which determines a polarization potential (Vtt), and the process further comprises using said polarization potential as a condition of operation of the receiver, said reproducing step comprises reproducing said resistive bridge into two resistive bridges (17') in said adaptation structure of the receiver, and said bringing step comprises placing said resistive bridge of the receiver under the control of said resistive bridges of said adaptation structure.
Claim 9
Dependent Claim
85 words
The process according to claim 4, characterized in that the structure of the receiver includes a resistive bridge (17) which determines a polarization potential (Vtt), and the process further comprises using said polarization potential as a condition of operation of the receiver, said reproducing step comprises reproducing said resistive bridge into two resistive bridges (17') in said adaptation structure of the receiver, and said bringing step comprises placing said resistive bridge of the receiver under the control of said resistive bridges of said adaptation structure.
Claim 10
Dependent Claim
117 words
Input impedance adaptation device (10) to adapt an impedance to the characteristic impedance of a transmission line that connects a transmitter (11) to a receiver (12) the transmitter having a structure (16) and generating a signal having a low level and a high level and the receiver having a structure (17) responsive to the signal, the device comprising an adaptation structure (16', 17') which reproduces the structure of the transmitter and/or receiver and is connected to a reference impedance (Rr), means for adapting said adaptation structure to said reference impedance, and closed loop control means (Len, Lep, Lrn, Lrp) connected to bring the structure of the transmitter and/or the receiver under the control of said adaptation structure.
Claim 11
Dependent Claim
117 words
Input impedance adaptation device (10) to adapt an impedance to the characteristic impedance of a transmission line that connects a transmitter (11) to a receiver (12) the transmitter having a structure (16) and generating a signal having a low level and a high level and the receiver having a structure (17) responsive to the signal, the device comprising an adaptation structure (16', 17') which reproduces the structure of the transmitter and/or receiver and is connected to a reference impedance (Rr), means for adapting said adaptation structure to said reference impedance, and closed loop control means (Len, Lep, Lrn, Lrp) connected to bring the structure of the transmitter and/or the receiver under the control of said adaptation structure.
Claim 12
Dependent Claim
38 words
A device according to claim 9, characterized in that the structure of the transmitter includes a CMOS-type inverter (16), and the structure of the receiver includes a CMOS-type inverter (Nr, Pr) polarized by an input resistive bridge (17).
Claim 13
Dependent Claim
19 words
A device according to claim 9, characterized in that the reference impedance (Rr) is twice the line's characteristic impedance.
Claim 14
Dependent Claim
19 words
A device according to claim 10, characterized in that the reference impedance (Rr) is twice the line's characteristic impedance.
Claim 15
Dependent Claim
71 words
A device according to claim 9, characterized in that the structure of the receiver comprises a resistive bridge (17) having two complementary types of transistors (N1, P1) in series between two power supply potentials, each having a gate to source voltage equal to a drain to source voltage and arranged so that their connections with said power supply potentials are the reverse of those of the transistors of a CMOS-type inverter.
Claim 16
Dependent Claim
71 words
A device according to claim 10, characterized in that the structure of the receiver comprises a resistive bridge (17) having two complementary types of transistors (N1, P1) in series between two power supply potentials, each having a gate to source voltage equal to a drain to source voltage and arranged so that their connections with said power supply potentials are the reverse of those of the transistors of a CMOS-type inverter.
Claim 17
Dependent Claim
16 words
A device according to claim 9, characterized in that said control means is digital in type.
Claim 18
Dependent Claim
16 words
A device according to claim 10, characterized in that said control means is digital in type.
Claim 19
Dependent Claim
16 words
A device according to claim 11, characterized in that said control means is digital in type.
Claim 20
Dependent Claim
16 words
A device according to claim 12, characterized in that said control means is digital in type.
Claim 21
Dependent Claim
16 words
A device according to claim 13, characterized in that said control means is digital in type.
Claim 22
Dependent Claim
16 words
A device according to claim 14, characterized in that said control means is digital in type.
Claim 23
Dependent Claim
15 words
A device according to claim 13, characterized in that said control means processes mean values.
Claim 24
Dependent Claim
15 words
A device according to claim 14, characterized in that said control means processes mean values.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-01-21 | 2000-07-22 | 2001-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-01-21 | 2004-07-22 | 2005-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-01-21 | 2008-07-22 | 2009-01-21 | $7700.00 | Window Closed / Lapsed |