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 Title: |
US5418498:
Low jitter ring oscillators
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
DeVito, Lawrence M.; Tewksbury, MA
McNeill, John A.; Belmont, MA
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| Assignee: |
Analog Devices, Inc., Norwood, MA
other patents from ANALOG DEVICES, INC. (28725) (approx. 876)
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| Published / Filed: |
1995-05-23
/ 1994-04-15
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| Application Number: |
US1994000228072
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| IPC Code: |
Advanced:
H03K 3/0231;
Core:
H03K 3/00;
IPC-7:
H03B 5/04;
H03B 5/24;
H03K 3/011;
H03K 3/023;
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| ECLA Code: |
H03K3/0231;
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| U.S. Class: |
Current:
331/057;
327/538;
330/252;
331/175;
Original:
331/057;
331/175;
327/538;
330/252;
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| Field of Search: |
331/057,111,113 R,175
307/608
330/252,253,254,257-261
327/246,538,256,551,260,290,231,233
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| Priority Number: |
| 1994-04-15 |
US1994000228072 |
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| Abstract: |
Low jitter ring oscillators are disclosed. The oscillators obtain their low jitter through the use of gates (100) and interpolators (160) having time delays of superior stability. The stability is obtained with decoupling networks (140) and delay replica generators (222) that isolate power supply noise from critical circuit parameters.
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| Attorney, Agent or Firm: |
Koppel & Jacobs ;
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| Primary / Asst. Examiners: |
Mis, David;
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| INPADOC Legal Status: |
Show legal status actions
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| Family: |
None
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First Claim:
Show all 19 claims |
What is claimed is:
1. A differential gate, comprising:
- a voltage supply structure that is subject to noise;
- a differential amplifier supplied by said voltage supply structure;
- a current source connected to provide a current flow through said differential amplifier; and
- a noise decoupling network that responds to noise on said voltage supply structure by coupling a sample thereof to said current source to oppose noise coupled from said voltage supply structure through said differential amplifier.
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| Background / Summary: |
Show background / summary
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| Drawing Descriptions: |
Show drawing descriptions
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| Description: |
Show description
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| Forward References: |
Show 15 U.S. patent(s) that reference this one
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| Foreign References: |
None
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| Other Abstract Info: |
DERABS G95-199865
DERG95-199865
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| Other References: |
Benny Lai, et al., "A Monolithic 622 Mb/s Clock Extraction Data Retiming Circuit", 1991 IEEE International Solid-State Circuits Conference, Digest of Technical Papers, pp. 144-145, no month.
Aaron Buchwald, et al., "A 6GHz Integrated Phase-Locked Loop Using AlGaAs/GaAs Hererojunction Bipolar Transistors", 1992 IEEE International Solid-State Circuits Conference, pp. 98-99 and 253, no month.
A. W. Buchwald, et al., "High-speed Voltage-Controlled Oscillator with Quadrature Outputs", Electronic Letters, Feb. 14, 1991, vol. 27, No. 4, pp. 309-310.
(2 pages)
Cited by 3 patents
[ISI abstract]
E. H. Armstrong, "A Method of Reducing Disturbances in Radio Signaling by a System of Frequency Modulation", Proceedings IRE, vol. 24, No. 5, May 1936, pp. 689-740.
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