US20040177286A1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for receiver circuit tuning
Assignee: Oracle America Inc
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Filing: 2003-03-03
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Granted: —
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Expires: 2023-03-03
Abstract
Abstract A method and apparatus adjusts a propagation delay through a receiver circuit. A transmission apparatus is arranged to generate a control signal where an impedance of a driver circuit is dependent on the control signal. A bias generator is operatively connected to the transmission apparatus and is dependent on the control signal. A receiver circuit is operatively connected to the bias generator where the bias generator is arranged to operatively adjust a propagation delay through the receiver circuit.
Inventors
- 👤 Claude Gauthier
- 👤 Aninda Roy
- 👤 Pradeep Trivedi
- 👤 Brian Amick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:01
CPC Classifications
H; H03; H03L; H03L7/00; H03L7/06; H03L7/08; H03L7/081; G; G06; G06F; G06F1/00; G06F1/04; G06F1/12; H03L7/16; H03L7/18
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
71 words
1 . An apparatus, comprising: a transmission apparatus arranged to generate a control signal, wherein an impedance of a driver circuit is dependent the control signal; a bias generator operatively connected to the transmission apparatus, wherein the bias generator is dependent on the control signal; and a receiver circuit operatively connected to the bias generator, wherein the bias generator is arranged to operatively adjust a propagation delay through the receiver circuit.
Claim 2
Dependent Claim
71 words
1 . An apparatus, comprising: a transmission apparatus arranged to generate a control signal, wherein an impedance of a driver circuit is dependent the control signal; a bias generator operatively connected to the transmission apparatus, wherein the bias generator is dependent on the control signal; and a receiver circuit operatively connected to the bias generator, wherein the bias generator is arranged to operatively adjust a propagation delay through the receiver circuit.
Claim 3
Dependent Claim
22 words
2 . The apparatus of claim 1 , wherein the receiver circuit is arranged to operatively receive data from a transmitting circuit.
Claim 4
Dependent Claim
26 words
3 . The apparatus of claim 1 , wherein the receiver circuit is arranged to operatively receive a clock signal generated from a phase locked loop.
Claim 5
Dependent Claim
21 words
4 . The apparatus of claim 1 , wherein the receiver circuit is arranged to operatively receive a system clock signal.
Claim 6
Dependent Claim
42 words
5 . The apparatus of claim 1 , wherein the bias generator is arranged to operatively adjust the adjust the propagation delay dependent on at least one of the group consisting of a temperature variation, a voltage variation, and a process variation.
Claim 7
Dependent Claim
41 words
6 . The apparatus of claim 1 , further comprising: a conversion circuit operatively connected to the transmission apparatus, wherein the conversion circuit is operatively adjusted by the control signal, and wherein the bias generator is adjustable by the conversion circuit.
Claim 8
Dependent Claim
22 words
7 . The apparatus of claim 6 , wherein the receiver circuit is arranged to operatively receive data from a transmitting circuit.
Claim 9
Dependent Claim
26 words
8 . The apparatus of claim 6 , wherein the receiver circuit is arranged to operatively receive a clock signal generated from a phase locked loop.
Claim 10
Dependent Claim
21 words
9 . The apparatus of claim 6 , wherein the receiver circuit is arranged to operatively receive a system clock signal.
Claim 11
Dependent Claim
61 words
10 . The apparatus of claim 1 , the transmission apparatus comprising: a buffer arranged to output a reference voltage potential; a comparator arranged to generate an output signal dependent on a difference between the reference voltage potential and a desired reference voltage potential; and a state machine arranged to adjust the buffer dependent on the output signal from the comparator.
Claim 12
Dependent Claim
23 words
11 . The apparatus of claim 10 , the transmission apparatus further comprising: a precision resistor operatively connected to the reference voltage potential.
Claim 13
Dependent Claim
31 words
12 . The apparatus of claim 1 , the driver circuit comprising: a plurality of transistors, wherein an impedance control code operatively adjusts at least one of the plurality of transistors.
Claim 14
Dependent Claim
41 words
13 . A method, comprising: adjusting a drive strength of a transmitted signal dependent on a control signal; generating a bias signal dependent on the control signal; and adjusting a propagation delay through a receiver circuit dependent on the bias signal.
Claim 15
Dependent Claim
41 words
13 . A method, comprising: adjusting a drive strength of a transmitted signal dependent on a control signal; generating a bias signal dependent on the control signal; and adjusting a propagation delay through a receiver circuit dependent on the bias signal.
Claim 16
Dependent Claim
43 words
14 . The method of claim 13 , wherein the adjusting the drive strength of the transmitted signal comprises: outputting a reference voltage potential; comparing the reference voltage potential and a desired reference voltage potential; and adjusting the outputting dependent on the comparing.
Claim 17
Dependent Claim
36 words
15 . The method of claim 13 , wherein the adjusting the drive strength of the transmitted signal comprises: selectively switching at least one transistor of a plurality of transistors dependent on an impedance control code.
Claim 18
Dependent Claim
34 words
16 . The method of claim 13 , wherein adjusting the propagation delay is dependent on at least one of the group consisting of a temperature variation, a voltage variation, and a process variation.
Claim 19
Dependent Claim
32 words
17 . The method of claim 13 , further comprising: converting the control signal into a digital control signal, wherein the generating the bias signal is dependent on the digital control signal.
Claim 20
Dependent Claim
57 words
18 . An apparatus, comprising: means for adjusting a drive strength of a transmitted signal dependent on a control signal; means for generating a bias signal dependent on the control signal; means for receiving a signal; and means for adjusting the propagation delay through the means for receiving dependent on the means for generating the bias signal.
Claim 21
Dependent Claim
57 words
18 . An apparatus, comprising: means for adjusting a drive strength of a transmitted signal dependent on a control signal; means for generating a bias signal dependent on the control signal; means for receiving a signal; and means for adjusting the propagation delay through the means for receiving dependent on the means for generating the bias signal.
Claim 22
Dependent Claim
55 words
19 . The apparatus of claim 18 , wherein the means for adjusting the drive strength of the transmitted signal comprises: means for outputting a reference voltage potential; means for comparing the reference voltage potential and a desired reference voltage potential; and means for adjusting the means for outputting dependent on the means for comparing.
Claim 23
Dependent Claim
36 words
20 . The apparatus of claim 18 , further comprising: means for converting the control signal into a digital control signal, wherein the means for generating the bias signal is dependent on the digital control signal.
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