US4001609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cmos power-on reset circuit
Assignee: US Philips Corp
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Filing: 1975-06-30
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Granted: 1977-01-04
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Expires: 1995-06-30
Abstract
Abstract For each IC and adapted circuit is accommodated on the same semiconductor substrate in order to define a specific initial state of the circuit groups, which generally consist of flip-flops. The use of the invention ensures a high constancy over a wide temperature range. Moreover, the spread in the tolerances of the circuit elements is substantially eliminated.
Inventors
- 👤 Klaus Sickert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:37
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/22; H03K17/223; H03K19/00; H03K19/02; H03K19/08; H03K19/094; H03K19/0944; H03K19/0948; H03K3/00; H03K3/02; H03K3/353; H03K3/356; H03K3/356008; H03K3/3565
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
208 words
An automatic reset circuit, comprising a common power supply line; an output terminal; a first enhancement mode p-type MOSFET having a first electrode connected to said common power supply line, a second electrode, and a gate connected to said second electrode of said first MOSFET; a second enhancement mode p-type MOSFET having a first electrode connected to said common power supply line, a second electrode, and a gate connected to ground; a third enhancement mode p-type MOSFET having a first electrode connected to said common power supply line, a second electrode, and a gate connected to said second electrode of said second MOSFET; a fourth enhancement mode n-type MOSFET having a first electrode connected to said second electrode of said second MOSFET, a second electrode connected to ground, and a gate connected to said gate of said first MOSFET; a fifth enhancement mode n-type MOSFET having a first electrode connected to said second electrode of said third MOSFET and to said output terminal for providing a predetermined voltage level upon activation of said common power supply line, a second electrode connected to ground, and a gate connected to said gate of said third MOSFET; and a diode connected between said common power supply line and said output terminal.
Claim 2
Dependent Claim
208 words
An automatic reset circuit, comprising a common power supply line; an output terminal; a first enhancement mode p-type MOSFET having a first electrode connected to said common power supply line, a second electrode, and a gate connected to said second electrode of said first MOSFET; a second enhancement mode p-type MOSFET having a first electrode connected to said common power supply line, a second electrode, and a gate connected to ground; a third enhancement mode p-type MOSFET having a first electrode connected to said common power supply line, a second electrode, and a gate connected to said second electrode of said second MOSFET; a fourth enhancement mode n-type MOSFET having a first electrode connected to said second electrode of said second MOSFET, a second electrode connected to ground, and a gate connected to said gate of said first MOSFET; a fifth enhancement mode n-type MOSFET having a first electrode connected to said second electrode of said third MOSFET and to said output terminal for providing a predetermined voltage level upon activation of said common power supply line, a second electrode connected to ground, and a gate connected to said gate of said third MOSFET; and a diode connected between said common power supply line and said output terminal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-04 | 1980-07-05 | 1981-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-04 | 1984-07-05 | 1985-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-04 | 1988-07-05 | 1989-01-04 | $7700.00 | Window Closed / Lapsed |