PT79881A - Ballast system with stabilized frequency a.g.c. - Google Patents

Ballast system with stabilized frequency a.g.c.

Info

Publication number
PT79881A
PT79881A PT7988185A PT7988185A PT79881A PT 79881 A PT79881 A PT 79881A PT 7988185 A PT7988185 A PT 7988185A PT 7988185 A PT7988185 A PT 7988185A PT 79881 A PT79881 A PT 79881A
Authority
PT
Portugal
Prior art keywords
frequency control
transformer
coupled
switching network
inverter transformer
Prior art date
Application number
PT7988185A
Other languages
Portuguese (pt)
Other versions
PT79881B (en
Original Assignee
Intent Patent Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Intent Patent Ag filed Critical Intent Patent Ag
Priority to PT7988185A priority Critical patent/PT79881B/en
Publication of PT79881A publication Critical patent/PT79881A/en
Publication of PT79881B publication Critical patent/PT79881B/en

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  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

A frequency control circuit (11) is coupled to a power source (12) and includes a transformer (43) and a frequency control capacitor (50) for establishing a constant oscillation signal at a predetermined frequency. A switching network (13) oscillation signal. Induction circuitry (15) is coupled to the switching network (13) and the frequency control circuit (11) and includes an inverter transformer (78) as well as coupling capacitors (86 and 88) for generating a voltage across the gas discharge tubes (40 and 40'). Automatic gain control circuitry (17) is included in inverter transformer (78) and is made up of a pair of secondary windings (80 and 81) wound so as to provide a negative feedback voltage to each of the transistors (70 and 70') of the switching network (13). The inverter transformer (78) has a pair of primary windings (82 and 84) which operate alternately and are coupled to the primary windings (45) of frequency control transformer (43 ) to provide a repetitive cycle.
PT7988185A 1985-01-25 1985-01-25 Ballast system with stabilized frequency a.g.c. PT79881B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PT7988185A PT79881B (en) 1985-01-25 1985-01-25 Ballast system with stabilized frequency a.g.c.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PT7988185A PT79881B (en) 1985-01-25 1985-01-25 Ballast system with stabilized frequency a.g.c.

Publications (2)

Publication Number Publication Date
PT79881A true PT79881A (en) 1985-02-01
PT79881B PT79881B (en) 1986-09-11

Family

ID=20083612

Family Applications (1)

Application Number Title Priority Date Filing Date
PT7988185A PT79881B (en) 1985-01-25 1985-01-25 Ballast system with stabilized frequency a.g.c.

Country Status (1)

Country Link
PT (1) PT79881B (en)

Also Published As

Publication number Publication date
PT79881B (en) 1986-09-11

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Effective date: 19990331