Patent US3575611A successfully refreshed from Google Patents.
US3575611A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency to direct current converter
Assignee: Honeywell Inc
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Filing: 1969-08-08
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Granted: 1971-04-20
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Expires: 1989-08-08
Abstract
Abstract A first transistor is controlled by an alternating current input signal and is cyclically rendered conductive and nonconductive in accordance with the frequency of the input signal. When the first transistor is nonconductive, a first and a second capacitor are charged by means of a series circuit including a first diode. A second transistor assumes a state of conduction in accordance with the charge of the second capacitor. When the first transistor is conductive, the first capacitor is discharged by means of a circuit including a second diode and the output of the second transistor. A direct current output is provided by the second transistor.
Inventors
- 👤 James R Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:26
CPC Classifications
G; G01; G01R; G01R23/00; G01R23/02; G01R23/06; H; H03; H03D; H03D3/00; H03D3/02; H03D3/06; H03D3/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
207 words
In a variable frequency-alternating current to variable magnitude direct current converter, the combination comprising: a first transistor having output means, and having input means adapted to receive a variable frequency-alternating current input and biased to a relatively conductive state during onehalf cycle of the input and to a relatively nonconductive state during the other half cycle of the input, a first series circuit of a first capacitor, a first diode and a second capacitor connected to the output means of said first transistor, said first diode being poled to cause said first and second capacitors to charge when said first transistor is in one of said states, a second transistor having output means, and having input means connected to said second capacitor to render said second transistor conductive in accordance with the state of charge of said second capacitor, a second series circuit of the output means of said second transistor, a second diode, said first capacitor and the output means of said first transistor, said second diode being poled to cause current to flow in said second series circuit in a direction to discharge said first capacitor when said first transistor is in the other of said states, and output means connected to said seconD transistor.
Claim 2
Dependent Claim
207 words
In a variable frequency-alternating current to variable magnitude direct current converter, the combination comprising: a first transistor having output means, and having input means adapted to receive a variable frequency-alternating current input and biased to a relatively conductive state during onehalf cycle of the input and to a relatively nonconductive state during the other half cycle of the input, a first series circuit of a first capacitor, a first diode and a second capacitor connected to the output means of said first transistor, said first diode being poled to cause said first and second capacitors to charge when said first transistor is in one of said states, a second transistor having output means, and having input means connected to said second capacitor to render said second transistor conductive in accordance with the state of charge of said second capacitor, a second series circuit of the output means of said second transistor, a second diode, said first capacitor and the output means of said first transistor, said second diode being poled to cause current to flow in said second series circuit in a direction to discharge said first capacitor when said first transistor is in the other of said states, and output means connected to said seconD transistor.
Claim 3
Dependent Claim
20 words
A converter as defined in claim 1 wherein said second capacitor has a larger capacitance value than said first capacitor.
Claim 4
Dependent Claim
23 words
A converter as defined in claim 1 wherein said one state is the nonconductive state and said other state is the conductive state.
Claim 5
Dependent Claim
24 words
A converter as defined in claim 3 wherein said first series circuit is connected in parallel with the output means of said first transistor.
Claim 6
Dependent Claim
47 words
A converter as defined in claim 4 wherein the output means of said second transistor includes impedance means having a direct current voltage thereacross whose magnitude varies with the conduction of said second transistor, and wherein said impedance means forms a portion of said second series circuit.
Claim 7
Dependent Claim
21 words
A converter as defined in claim 5 wherein said output means includes said impedance means and a parallel connected third capacitor.
Claim 8
Dependent Claim
14 words
A converter as defined in claim 6 wherein said impedance means is resistance means.
Claim 9
Dependent Claim
20 words
A converter as defined in claim 7 wherein said second capacitor has a larger capacitance value than said first capacitor.
References Cited (Backward Citations)
US3149243A
Cited
US3187202A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |