US3728558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synchronized trigger generators for use with a switching regulator
Assignee: Bull HN Information Systems Italia SpA
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Filing: 1971-10-20
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Granted: 1973-04-17
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Expires: 1991-10-20
Abstract
Abstract A JK flip-flop provides signals to alternately trigger first and second transistor blocking oscillators which supply trigger signals for a switching regulator. Each of the blocking oscillators uses a capacitor between the transistor base and ground to reduce the effects of noise signals and uses an inductor in the transistor emitter circuit to prevent high frequency oscillations.
Inventors
- 👤 L Genuit
- 👤 J Nowell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:07
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/01; H03K3/013
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
171 words
A blocking oscillator comprising: a transistor having a base, a collector and an emitter; a transformer having a primary winding and first and second secondary windings; first and second reference potentials, a first end of said primary winding being connected to said first potential, a second end of said primary winding being coupled to said collector of said transistor, a first end of said first secondary winding being connected to said second potential, a second end of said first secondary winding being coupled to said base of said transistor; a capacitor, said capacitor being connected between said second potential and said base of said transistor; an inductor, said inductor being connected between said second potential and said emitter of said transistor; an input lead, said input lead being connected to said base of said transistor; and first and second output leads, said first output lead being coupled to a first end of said second secondary winding, said second output lead being coupled to a second end of said second secondary winding.
Claim 2
Dependent Claim
171 words
A blocking oscillator comprising: a transistor having a base, a collector and an emitter; a transformer having a primary winding and first and second secondary windings; first and second reference potentials, a first end of said primary winding being connected to said first potential, a second end of said primary winding being coupled to said collector of said transistor, a first end of said first secondary winding being connected to said second potential, a second end of said first secondary winding being coupled to said base of said transistor; a capacitor, said capacitor being connected between said second potential and said base of said transistor; an inductor, said inductor being connected between said second potential and said emitter of said transistor; an input lead, said input lead being connected to said base of said transistor; and first and second output leads, said first output lead being coupled to a first end of said second secondary winding, said second output lead being coupled to a second end of said second secondary winding.
Claim 3
Dependent Claim
43 words
A blocking oscillator as defined in claim 1 including: first and second diodes, said first diode being connected between said first potential and said collector of said transistor, said second diode being connected between said second potential and said base of said transistor.
Claim 4
Dependent Claim
52 words
A blocking oscillator as defined in claim 1 including: first and second resistors, said first resistor being connected between said collector of said transistor and said second end of said primary winding, said second resistor being connected between said base of said transistor and said second end of said first secondary winding.
Claim 5
Dependent Claim
127 words
A blocking oscillator as defined in claim 1 including: first, second and third diodes, said first diode being connected between said first potential and said collector of said transistor, said second diode being connected between said second potential and said base of said transistor, said third diode being connected between said first output lead and a first end of said second secondary winding; and first, second and third resistors, said first resistor being connected between said collector of said transistor and said second end of said primary winding, said second resistor being connected between said base of said transistor and said second end of saId first secondary winding, said third resistor being connected between said second output lead and a second end of said second secondary winding.
Claim 6
Dependent Claim
271 words
A trigger generator for use with a switching regulator comprising, in combination: a flip-flop having an input lead and first and second output leads; first and second differentiators each having an input lead and an output lead, said input lead of each of said differentiators being connected to a corresponding one of said output leads of said flip-flop; first and second blocking oscillators each having an input lead and first and second output leads, each of said oscillators including: a transistor having a base, a collector and an emitter, said input lead of said oscillator being connected to said base of said transistor; a transformer having a primary winding and first and second secondary windings; first and second reference potentials, a first end of said primary winding being connected to said first potential, a second end of said primary winding being coupled to said collector of said transistor, a first end of said first secondary winding being connected to said second potential, a second end of said first secondary winding being coupled to said base of said transistor; a capacitor, said capacitor being connected between said second potential and said base of said transistor; and an inductor, said inductor being connected between said second potential and said emitter of said transistor, said first output lead of said oscillator being coupled to a first end of said secondary winding, said second output lead of said oscillator being coupled to a said second end of said secondary winding, said input lead of each of said oscillators being coupled to a corresponding one of said output leads of said first and said second differentiators.
Claim 7
Dependent Claim
271 words
A trigger generator for use with a switching regulator comprising, in combination: a flip-flop having an input lead and first and second output leads; first and second differentiators each having an input lead and an output lead, said input lead of each of said differentiators being connected to a corresponding one of said output leads of said flip-flop; first and second blocking oscillators each having an input lead and first and second output leads, each of said oscillators including: a transistor having a base, a collector and an emitter, said input lead of said oscillator being connected to said base of said transistor; a transformer having a primary winding and first and second secondary windings; first and second reference potentials, a first end of said primary winding being connected to said first potential, a second end of said primary winding being coupled to said collector of said transistor, a first end of said first secondary winding being connected to said second potential, a second end of said first secondary winding being coupled to said base of said transistor; a capacitor, said capacitor being connected between said second potential and said base of said transistor; and an inductor, said inductor being connected between said second potential and said emitter of said transistor, said first output lead of said oscillator being coupled to a first end of said secondary winding, said second output lead of said oscillator being coupled to a said second end of said secondary winding, said input lead of each of said oscillators being coupled to a corresponding one of said output leads of said first and said second differentiators.
Claim 8
Dependent Claim
138 words
A trigger generator as defined in claim 5 wherein each of said blocking oscillators includes: first, second and third diodes, said first diode being connected between said first potential and said collector of said transistor, said second diode being connected between said second potential and said base of said transistor, said third diode being connected between said first output lead of said oscillator and a first end of said secondary winding; and first, second and third resistors, said first resister being connected between said collector of said transistor and said second end of said primary winding, said second resistor being connected between said base of said transistor and said second end of said first secondary winding, said third resistor being connected between said second output lead of said oscillator and a second end of said second secondary winding.
Claim 9
Dependent Claim
64 words
A trigger generator as defined in claim 5 including: fourth and fifth diodes each having a cathode and an anode, said fourth diode being connected between said output lead of said first differentiator and said input lead of said first blocking oscillator, said fifth diode being connected between said output lead of said second differentiator and said input lead of said second blocking oscillator.
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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |