US3914697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
PFN Regulator
Assignee: Westinghouse Electric Corp
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Filing: 1974-11-15
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Granted: 1975-10-21
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Expires: 1994-11-15
Abstract
Abstract A pulse forming network (PFN) is charged to an initial voltage level above a desired operating level. The PFN is then slowly discharged by a controlled discharge path, exponentially down to a final desired operating level, at which main discharge into a load occurs.
Inventors
- 👤 Howard S Feldmesser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:24
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/53
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
127 words
Pulse forming network regulation circuitry comprising: A. a pulse forming network operable to store energy and provide said energy as a discharge pulse to a load circuit upon application of a firing signal at a time of firing; B. means for charging said pulse forming network to an initial voltage level subject to deviation from one pulse time to another; C. a D.C. reference potential; D. means for generating an error signal indicative of the difference between said reference potential and PFN voltage; and E. means responsive to said error signal for regulating the voltage of said pulse forming network down to a desired operating voltage level and maintaining the pulse forming network voltage substantially at said desired operating voltage level regardless of said time of firing.
Claim 2
Dependent Claim
127 words
Pulse forming network regulation circuitry comprising: A. a pulse forming network operable to store energy and provide said energy as a discharge pulse to a load circuit upon application of a firing signal at a time of firing; B. means for charging said pulse forming network to an initial voltage level subject to deviation from one pulse time to another; C. a D.C. reference potential; D. means for generating an error signal indicative of the difference between said reference potential and PFN voltage; and E. means responsive to said error signal for regulating the voltage of said pulse forming network down to a desired operating voltage level and maintaining the pulse forming network voltage substantially at said desired operating voltage level regardless of said time of firing.
Claim 3
Dependent Claim
169 words
Pulse forming network regulation circuitry comprising: A. a pulse forming network operable to store energy and provide said energy as a discharge pulse to a load circuit upon application of a firing signal at a time of firing; B. means for charging said pulse forming network to an initial voltage level subject to deviation from one pulse time to another; C. a discharge path including current control means operatively connected to said pulse forming network; D. means for obtaining an indication of pulse forming network voltage; E. means for providing a D.C. reference potential indicative of a desired operating voltage level to which said pulse forming network voltage is to be regulated; F. means for comparing said D.C. reference potential and said indication of pulse forming network voltage for providing an error signal; G. said error signal being connected to control said current control means to reduce the current therethrough to maintain said pulse forming network voltage substantially at said desired operating level regardless of said time of firing.
Claim 4
Dependent Claim
169 words
Pulse forming network regulation circuitry comprising: A. a pulse forming network operable to store energy and provide said energy as a discharge pulse to a load circuit upon application of a firing signal at a time of firing; B. means for charging said pulse forming network to an initial voltage level subject to deviation from one pulse time to another; C. a discharge path including current control means operatively connected to said pulse forming network; D. means for obtaining an indication of pulse forming network voltage; E. means for providing a D.C. reference potential indicative of a desired operating voltage level to which said pulse forming network voltage is to be regulated; F. means for comparing said D.C. reference potential and said indication of pulse forming network voltage for providing an error signal; G. said error signal being connected to control said current control means to reduce the current therethrough to maintain said pulse forming network voltage substantially at said desired operating level regardless of said time of firing.
Claim 5
Dependent Claim
63 words
Apparatus according to claim 2 wherein; A. said current control means includes a three electrode device, a first electrode being connected to said pulse forming network, an electrode being connected to a reference potential and a third electrode constituting an input; and which includes B. amplifier means having an input for receiving said error signal and an output connected to said third electrode.
Claim 6
Dependent Claim
59 words
Apparatus according to claim 3, wherein: A. said amplifier means is a differential amplifier having first and second inputs; B. said error signal being connected to said first input; and additionally including, C. means for providing a feedback signal indicative of the current through said current control means; and D. said feedback signal being connected to said second input.
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) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |