US3348072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low-voltage wide-range comparator and rectifier using a plurality of emitter-follower circuits with the collector current of the conducting emitter-follower maintained constant
Assignee: Individual
•
Filing: 1965-05-26
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Granted: 1967-10-17
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Expires: 1985-05-26
Abstract
No abstract record available.
Inventors
- 👤 Ira R Marcus
- 👤 Joseph W Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:52
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/0038
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
A LOW-VOLTAGE, WIDE-RANGE COMPARATOR COMPRISING: (A) A FIRST TRANSISTOR HAVING A BASE, AN EMITTER, AND A COLLECTOR, (B) A SECOND TRANSISTOR HAVING A BASE, AN EMITTER, AND A COLLECTOR, (C) A COMMON LOAD RESISTANCE CONNECTED TO THE EMITTERS OF SAID FIRST AND SECOND TRANSISTOR, (D) A FIRST RESISTOR CONNECTED TO THE COLLECTOR OF SAID FIRST TRANSISTOR AND TO A SOURCE OF SUPPLY VOLTAGE, (E) A SECOND RESISTOR CONNECTED TO THE COLLECTOR OF SAID SECOND TRANSISTOR AND TO A SOURCE OF SUPPLY VOLTAGE, (F) A FIRST CURRENT AMPLIFIER HAVING ITS INPUT CONNECTED TO THE COLLECTOR OF SAID FIRST TRANSISTOR AND ITS OUTPUT CONNECTED TO THE COMMON EMITTER JUNCTION OF SAID FIRST AND SECOND TRANSISTORS, SAID FIRST RESISTOR SERVES TO ESTATBLISH THE OPERATING POINT OF SAID FIRST CURRENT AMPLIFIER, AND (G) A SECOND CURRENT AMPLIFIER HAVING ITS INPUT CONNECTED TO THE COLLECTOR OF SAID SECOND TRANSISTOR AND ITS OUTPUT CONNECTED TO THE COMMON EMITTER JUNCTIONS OF SAID FIRST AND SECOND TANSISTORS, SAID SECOND RESISTOR SERVES TO ESTABLISH THE OPERATING POINT OF SAID SECOND CURRENT AMPLIFIER.
Claim 2
Dependent Claim
173 words
A LOW-VOLTAGE, WIDE-RANGE COMPARATOR COMPRISING: (A) A FIRST TRANSISTOR HAVING A BASE, AN EMITTER, AND A COLLECTOR, (B) A SECOND TRANSISTOR HAVING A BASE, AN EMITTER, AND A COLLECTOR, (C) A COMMON LOAD RESISTANCE CONNECTED TO THE EMITTERS OF SAID FIRST AND SECOND TRANSISTOR, (D) A FIRST RESISTOR CONNECTED TO THE COLLECTOR OF SAID FIRST TRANSISTOR AND TO A SOURCE OF SUPPLY VOLTAGE, (E) A SECOND RESISTOR CONNECTED TO THE COLLECTOR OF SAID SECOND TRANSISTOR AND TO A SOURCE OF SUPPLY VOLTAGE, (F) A FIRST CURRENT AMPLIFIER HAVING ITS INPUT CONNECTED TO THE COLLECTOR OF SAID FIRST TRANSISTOR AND ITS OUTPUT CONNECTED TO THE COMMON EMITTER JUNCTION OF SAID FIRST AND SECOND TRANSISTORS, SAID FIRST RESISTOR SERVES TO ESTATBLISH THE OPERATING POINT OF SAID FIRST CURRENT AMPLIFIER, AND (G) A SECOND CURRENT AMPLIFIER HAVING ITS INPUT CONNECTED TO THE COLLECTOR OF SAID SECOND TRANSISTOR AND ITS OUTPUT CONNECTED TO THE COMMON EMITTER JUNCTIONS OF SAID FIRST AND SECOND TANSISTORS, SAID SECOND RESISTOR SERVES TO ESTABLISH THE OPERATING POINT OF SAID SECOND CURRENT AMPLIFIER.
References Cited (Backward Citations)
US2892940A
Cited
US3181008A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-16 | 1971-04-17 | 1971-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-16 | 1975-04-17 | 1975-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-16 | 1979-04-17 | 1979-10-17 | $7700.00 | Window Closed / Lapsed |