US6141764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for initializing an electronic device using a dual-state power-on-reset circuit
Assignee: Maxim Integrated Products Inc
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Filing: 1999-10-26
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Granted: 2000-10-31
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Expires: 2019-10-26
Abstract
Abstract An initializer that responds to change in a power supply potential level, for generating an initialize signal to initialize a circuit to a select state, the initializer includes a power-on reset circuit that switches between an active and a powered-down state, and is for generating the initialize signal. The initializer also includes a wake-up circuit that monitors the power supply potential level and switches the power-on reset circuit from the powered-down state to the active state when selected change in the power supply potential level occurs.
Inventors
- 👤 Richard William Ezell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:41
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/07; G06F11/0703; G06F11/0751; G06F11/0754; G06F1/00; G06F1/24; G06F1/26; G06F1/30; G06F1/305
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
88 words
A method for initializing an electronic device, the method comprising the steps of: detecting a change in a power supply voltage; generating a signal to switch a power-on-reset (POR) circuit from a first power state to a second power state responsive to detecting a change in the power supply voltage; determining if the power supply voltage has fallen below a minimum operating voltage; and responsive to the determination that the power supply voltage has fallen below the minimum operating voltage, generating an initialization signal for the electronic device.
Claim 2
Independent Claim
88 words
A method for initializing an electronic device, the method comprising the steps of: detecting a change in a power supply voltage; generating a signal to switch a power-on-reset (POR) circuit from a first power state to a second power state responsive to detecting a change in the power supply voltage; determining if the power supply voltage has fallen below a minimum operating voltage; and responsive to the determination that the power supply voltage has fallen below the minimum operating voltage, generating an initialization signal for the electronic device.
Claim 3
Dependent Claim
47 words
The method of claim 1, wherein the step of generating a signal to switch the POR circuit comprises the step of: generating a signal to switch the POR circuit from a power-off state to a powered-up state responsive to detecting a change in the power supply voltage.
Claim 4
Dependent Claim
18 words
The method of claim 1, wherein the first power state consumes less energy than the second power state.
Claim 5
Dependent Claim
49 words
The method of claim 1, wherein the step of generating a signal to switch the POR circuit comprises the step of: generating a signal to switch the POR circuit from a stand-by power state to an active power state responsive to detecting a change in the power supply voltage.
Claim 6
Dependent Claim
25 words
The method of claim 1, wherein the step of determining is performed subsequent to the step of generating a signal to switch the POR circuit.
Claim 7
Dependent Claim
30 words
The method of claim 1, further comprising the step of: subsequent to generating an electronic device initialization signal, switching the POR circuit from the second state to the first state.
Claim 8
Dependent Claim
39 words
The method of claim 1, wherein the step of determining comprises the step of: determining if the power supply voltage has fallen to a voltage level between the minimum operating voltage and a voltage level greater than zero volts.
Claim 9
Dependent Claim
29 words
The method of claim 1, wherein the step of generating an initialization signal is performed responsive to the determination that the power supply voltage has fallen to zero volts.
Claim 10
Dependent Claim
25 words
The method of claim 1, wherein the first power state is one of an off-state, a low-power state, an inactive state and a standby state.
Claim 11
Dependent Claim
14 words
The method of claim 1, wherein the steps are performed in the listed order.
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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) | 2003-10-31 | 2004-05-01 | 2004-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-10-31 | 2008-05-01 | 2008-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-10-31 | 2012-05-01 | 2012-10-31 | $7700.00 | Window Closed / Lapsed |