US3287652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Push-pull amplifier circuit having an inductive load and method for obtaining a symmetrical gain
Assignee: Individual
•
Filing: 1964-03-27
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Granted: 1966-11-22
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Expires: 1984-03-27
Abstract
No abstract record available.
Inventors
- 👤 Bert K Erickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:22
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/26
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
136 words
A SINGLE ENDED PUSH-PULL AMPLIFIER CIRCUIT FOR DRIVING AN INDUCTIVE LOAD COMPRISING: A FIRST AND SECOND TRANSISTOR OF LIKE TYPE EACH HAVING A COLLECTOR, EMITTER, AND BASE; AN INDUCTIVE LOAD CONNECTED TO THE COLLECTOR OF SAID FIRST AND SECOND TRANSISTOR; A SUPPLY VOLTAGE SOURCE CONNECTED AT THE MIDPOINT OF SAID INDUCTIVE LOAD; A THIRD TRANSISTOR HAVING A COLLECTOR, EMITTER AND BASE FOR INVERTING ONE HALF OF THE INDUCTIVE LOAD, ONE HALF OF THE INDUCTIVE LOAD BEING CONNECTED TO THE THIRD RESISTOR IN A COMMON EMITTER CONFIGURATION AND THE OTHER HALF BEING CONNECTED IN A COMMON BASE CONFIGURATON WITH THE EMITTER AND BASE BEING RESISTIVELY CONNECTED TO THE COLLECTORS OF THE FIRST END SECOND TRANSISTORS; AND A LOAD RESISTOR CONNECTED TO THE MIDPOINT OF SAID LOAD AND TO SAID THIRD TRANSISTOR FOR DEVELOPING A SINGLE ENDED OUTPUT.
Claim 2
Dependent Claim
136 words
A SINGLE ENDED PUSH-PULL AMPLIFIER CIRCUIT FOR DRIVING AN INDUCTIVE LOAD COMPRISING: A FIRST AND SECOND TRANSISTOR OF LIKE TYPE EACH HAVING A COLLECTOR, EMITTER, AND BASE; AN INDUCTIVE LOAD CONNECTED TO THE COLLECTOR OF SAID FIRST AND SECOND TRANSISTOR; A SUPPLY VOLTAGE SOURCE CONNECTED AT THE MIDPOINT OF SAID INDUCTIVE LOAD; A THIRD TRANSISTOR HAVING A COLLECTOR, EMITTER AND BASE FOR INVERTING ONE HALF OF THE INDUCTIVE LOAD, ONE HALF OF THE INDUCTIVE LOAD BEING CONNECTED TO THE THIRD RESISTOR IN A COMMON EMITTER CONFIGURATION AND THE OTHER HALF BEING CONNECTED IN A COMMON BASE CONFIGURATON WITH THE EMITTER AND BASE BEING RESISTIVELY CONNECTED TO THE COLLECTORS OF THE FIRST END SECOND TRANSISTORS; AND A LOAD RESISTOR CONNECTED TO THE MIDPOINT OF SAID LOAD AND TO SAID THIRD TRANSISTOR FOR DEVELOPING A SINGLE ENDED OUTPUT.
Claim 3
Independent Claim
167 words
A METHOD OF PRODUCING A SYMMETRICAL GAIN FROM A PUSH-PULL AMPLIFIER HAVING A SINGLE ENDED FORM WHILE OBTAINING A FEEDBACK SIGNAL FOR DRIVING AN INDUCTIVE LOAD COMPRISING: CONNECTING AN INDUCTIVE LOAD TO THE COLLECTORS OF THE PUSH-PULL TRANSISTORS WITH A SUPPLY VOLTAGE SOURCE AT THE MIDPOINT OF THE INDUCTIVE LOAD; CONNECTING A LOAD RESISTOR BETWEEN THE SUPPLY VOLTAGE SOURCE AND THE COLLECTOR OF AN INVERTING TRANSISTOR ONE HALF OF THE INDUCTIVE LOAD BEING CONNECTED TO THE INVERTER TRANSISTOR IN A COMMON EMITTER CONFIGURATION AND THE OTHER HALF BEING CONNECTED IN A COMMON BASE CONFIGURATION; CONNECTING BIASING RESISTORS TO THE EMITTER AND BASE OF THE INVERTER TRANSISTOR ONE BIASING RESISTOR BEING VARIABLE AND THE OTHER BEING FIXED; AND BALANCING THE AMPLIFIER CIRCUIT TO OBTAIN A SYMMETRICAL GAIN BY DISCONNECTING THE FIXED BIASING RESISTOR AT ONE END OF THE INDUCTIVE LOAD, CONNECTING THE FIXED BIASING RESISTOR TO THE OPPOSITE END OF THE INDUCTIVE LOAD, AND ADJUSTING A VARIABLE BIASING RESISTOR TO CREATE A NULL VALUE AT THE LOAD RESISTOR.
Claim 4
Independent Claim
167 words
A METHOD OF PRODUCING A SYMMETRICAL GAIN FROM A PUSH-PULL AMPLIFIER HAVING A SINGLE ENDED FORM WHILE OBTAINING A FEEDBACK SIGNAL FOR DRIVING AN INDUCTIVE LOAD COMPRISING: CONNECTING AN INDUCTIVE LOAD TO THE COLLECTORS OF THE PUSH-PULL TRANSISTORS WITH A SUPPLY VOLTAGE SOURCE AT THE MIDPOINT OF THE INDUCTIVE LOAD; CONNECTING A LOAD RESISTOR BETWEEN THE SUPPLY VOLTAGE SOURCE AND THE COLLECTOR OF AN INVERTING TRANSISTOR ONE HALF OF THE INDUCTIVE LOAD BEING CONNECTED TO THE INVERTER TRANSISTOR IN A COMMON EMITTER CONFIGURATION AND THE OTHER HALF BEING CONNECTED IN A COMMON BASE CONFIGURATION; CONNECTING BIASING RESISTORS TO THE EMITTER AND BASE OF THE INVERTER TRANSISTOR ONE BIASING RESISTOR BEING VARIABLE AND THE OTHER BEING FIXED; AND BALANCING THE AMPLIFIER CIRCUIT TO OBTAIN A SYMMETRICAL GAIN BY DISCONNECTING THE FIXED BIASING RESISTOR AT ONE END OF THE INDUCTIVE LOAD, CONNECTING THE FIXED BIASING RESISTOR TO THE OPPOSITE END OF THE INDUCTIVE LOAD, AND ADJUSTING A VARIABLE BIASING RESISTOR TO CREATE A NULL VALUE AT THE LOAD RESISTOR.
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) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |