Constant current source
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 30, 1996
Grant Date -
N/A
app pub date -
Oct 20, 1994
filing date -
Oct 20, 1993
priority date (Note) -
Expired
status (Latency Note)
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Forward Citations
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Abstract
A constant-current source that contains two substantial identical field effect transistors as well as a simple resistance network. The actual saturation current of one of the field effect transistors is measured and converted by the resistance network into a control voltage for the other field effect transistor which produces the desired constant current. With such a circuit, production tolerances, especially tolerances for field effect transistor, as well as operation-dependent temperature variations can be compensated for within a wide range.
First Claim
all claims..Other Claims data not available
Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
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DEUTSCHE AEROSPACE AG | PATENTABTEILUNG ROBERT-KOCH-STRASSE D-8012 OTTOBRUNN |
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Feldle, Heinz-Peter | Senden, DE | 6 | 62 |
# of filed Patents : 6 Total Citations : 62 | |||
Ludwig, Michael | Ulm, DE | 55 | 230 |
# of filed Patents : 55 Total Citations : 230 | |||
Reber, Rolf | Ulm, DE | 6 | 39 |
# of filed Patents : 6 Total Citations : 39 |
Cited Art Landscape
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Patent Citation Ranking
- 11 Citation Count
- H01L Class
- 42.86 % this patent is cited more than
- 29 Age
Forward Cite Landscape
- No Forward Cites to Display

Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
Full Text

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Jun 10, 2024 | LAPS | LAPSE FOR FAILURE TO PAY MAINTENANCE FEES | free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
Jun 10, 2024 | STCH | INFORMATION ON STATUS: PATENT DISCONTINUATION | free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
May 03, 2024 | FP | LAPSED DUE TO FAILURE TO PAY MAINTENANCE FEE | Effective Date: May 03, 2024 |
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Jan 19, 2017 | AS | ASSIGNMENT | free format text: TERMINATION AND RELEASE OF SECURITY INTEREST IN PATENTS;ASSIGNOR:BANK OF AMERICA, N.A., AS COLLATERAL AGENT;REEL/FRAME:041712/0001 Owner name: BROADCOM CORPORATION, CALIFORNIA Effective Date: Jan 19, 2017 |
May 03, 2016 | I | Issuance | |
Apr 13, 2016 | STCF | INFORMATION ON STATUS: PATENT GRANT | free format text: PATENTED CASE |
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Jan 05, 2016 | ZAAB | NOTICE OF ALLOWANCE MAILED | free format text: ORIGINAL CODE: MN/=. |
Jan 04, 2016 | ZAAA | NOTICE OF ALLOWANCE AND FEES DUE | free format text: ORIGINAL CODE: NOA |
Dec 27, 2012 | P | Published | |
Oct 22, 2012 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MACINNIS, ALEXANDER G.;ALVAREZ, JOSE' R.;ZHONG, SHENG;AND OTHERS;SIGNING DATES FROM 20020328 TO 20120329;REEL/FRAME:029167/0121 Owner name: BROADCOM CORPORATION, CALIFORNIA |
Sep 10, 2012 | F | Filing | |
Apr 01, 2002 | PD | Priority Date |

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