US3581224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bipolar operational power supply
Assignee: Forbro Design Corp
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Filing: 1968-12-30
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Granted: 1971-05-25
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Expires: 1988-12-30
Abstract
Abstract A bipolar operational power supply is constructed to provide stable operation over a wide range of gain settings including zero and with various load conditions in order to provide power output with AC or DC control or combinations of the two and in either voltage or current modes.
Inventors
- 👤 Sarkis Nercessian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:48
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/26; G; G05; G05F; G05F1/00; G05F1/10; G05F1/46
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
166 words
In a bipolar output regulated power supply, the combination of: an operational voltage amplifier including an inverting input terminal, an output terminal and a common terminal; a push-pull, unity voltage gain, power amplifier coupled to said operational voltage amplifier output terminal and including an input terminal and two output terminals, one in phase and the other out of phase with the last said input terminal; a null junction terminal; resistive means connected between said null junction and said inverting input to the voltage amplifier; resistive degenerative feedback means connected between said in phase output and said null junction; capacitive degenerative feedback means connected between said output of the voltage amplifier and said inverting input thereof; and a source of input voltage connected through a resistive means between said common terminal of the voltage amplifier and said null junction; whereby the unity gain frequency of said voltage amplifier is substantially determined by the capacity of said capacitive means and the resistance of said first said resistive means.
Claim 2
Dependent Claim
166 words
In a bipolar output regulated power supply, the combination of: an operational voltage amplifier including an inverting input terminal, an output terminal and a common terminal; a push-pull, unity voltage gain, power amplifier coupled to said operational voltage amplifier output terminal and including an input terminal and two output terminals, one in phase and the other out of phase with the last said input terminal; a null junction terminal; resistive means connected between said null junction and said inverting input to the voltage amplifier; resistive degenerative feedback means connected between said in phase output and said null junction; capacitive degenerative feedback means connected between said output of the voltage amplifier and said inverting input thereof; and a source of input voltage connected through a resistive means between said common terminal of the voltage amplifier and said null junction; whereby the unity gain frequency of said voltage amplifier is substantially determined by the capacity of said capacitive means and the resistance of said first said resistive means.
Claim 3
Dependent Claim
29 words
A bipolar output regulated power supply as set forth in claim 1; wherein said resistive feedback means is a variable resistor for controlling the output of said power supply.
Claim 4
Dependent Claim
50 words
A bipolar output regulated power supply as set forth in claim 1; and including two back-to-back series connected Zener diodes connected between said in phase output of said power amplifier and said null junction for limiting the output voltage of said power amplifier in both the positive and negative direction.
Claim 5
Dependent Claim
47 words
A bipolar output regulated power supply as set forth in claim 1; and including means for applying known voltages, both positive and negative, through resistive means, between said common terminal of said voltage amplifier and said null junction, for activating said power supply in a known mode.
Claim 6
Dependent Claim
42 words
A bipolar output regulated power supply as set forth in claim 1; and including a source of known DC current connected between said common terminal and said null junction and wherein said source of input voltage is a source of altErnating current.
Claim 7
Dependent Claim
46 words
A bipolar output regulated power supply as set forth in claim 1; wherein said capacitive feedback means is plural and including switch means for selecting one of said capacitive means to be active connected between said output of said voltage amplifier and said inverting input thereof.
Claim 8
Dependent Claim
35 words
A bipolar output regulated power supply as set forth in claim 1; wherein said power amplifier has a frequency response which is substantially flat to and beyond said unity gain frequency of said power amplifier.
References Cited (Backward Citations)
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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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |