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In accordance with the present invention, a regulated power supply for a television receiver which includes a number of load circuits comprises an unregulated voltage source coupled to a datasheef terminal of a primary transformer winding.

When transistor 16 is turned off, by action of the switching pulses from regulator control circuit 22, the stored inductive energy in winding 14 causes the collector-emitter voltage of transistor 16 to rise. This invention relates to regulated power supplies for television receivers and in particular to switched mode ddatasheet supplies having transformers for regulating load circuit voltages.

Comments on this blog may be blocked or deleted at any time. The catch winding is needed to remove the remaining stored energy from the primary winding to prevent inductive switching transients from damaging receiver components.

This attitude was reflected not only in the manufacturing of material goods, but also in the realms of art and architecture, dagasheet well as in the social fabric of everyday life. The unregulated voltage source is coupled to the primary winding second terminal and selectively energizes the winding. Don’t forget the pastthe end of the world is upon us! Doing so it starts from dtasheet most recent post to the older post simple clicking on the Older Post button on the bottom of each page after readingpost after post.

Under certain severe receiver operating conditions, such as low ac line voltage, receiver an59000, or high load circuit power requirements, there may be insufficient power transferred between primary winding 14 and the load windings to maintain accurate regulation of the load circuit supply voltages.

AN Datasheet pdf – Switching Regulator Control Circuit – Matsushita Electric Works(Nais)

The potential difference between primary winding 14 and supplemental winding 41 datazheet relatively small, as contrasted to the potential difference between primary winding 14 and high voltage winding 23, for example. This permits windings 14 and 41 to be layer-wound as previously described in order to provide tight magnetic coupling yet allows windings 14 and 41 to be electrically isolated through the use, for example, of 20 mils of Mylar between windings 14 and Decreases in the ac line voltage or increased circuit loading will cause an increase in the SCR conduction time and an increase in line voltage will result in a decrease in SCR conduction time.


Sampling of any of the other load circuit supply voltages could also be done. It’s used in sets fitted with 20, 21, 22, 24, 26 datasehet 28in. The conduction time of the transistor switch is controlled in order to regulate the magnitude of the voltages induced across the load circuit windings. In this way, the load circuits which are coupled to the interface connectors will be electrically isolated from the ac line.

When transistor 16 turns off, its collector voltage rapidly rises, creating an inductive voltage spike as shown in FIG.

Both chassis are found under other guises, such as Hitachi, Granada, Finlandia and Luxor. As a result, I started to notice gaps in the current representation of the history of electronic and electrical technology to the interested member of the public.

The conduction time of the SCR is controlled to maintain a fixed regulated voltage level. Truly, it is the high point of all Western civilization. The fact that a comment is permitted in no way constitutes an endorsement of any view expressed, fact alleged, or link provided in that comment by the administrator of this site.

If you’re pointing particular things it will datwsheet IT for you; or you can place a brand name in the search query at your choice and visit all results page by page. The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory The society that prioritized human, social and datasheeh quality is a Winner.

Datashet means that there may be a delay between the submission and the eventual appearance of your comment. All sets and apparates datasheett here are property of Engineer Frank Sharp. The collector-emitter voltage of horizontal output transistor 31 V BE31illustrating the horizontal retrace pulse, is shown in FIG. Every CRT Ab5900 saved let revive knowledge, thoughts, moments of the past life which will never return again The chassis themselves are very different in physical appearance, though the circuits are similar.

【AN PANASONIC】Electronic Components In Stock Suppliers in 【Price】【цена】【Datasheet PDF】USA

It may also be desirable to provide audio output terminals in order to reproduce audio program material through an external amplifier and speakers. The heavy, ugly sarcophagus ; models with few endearing qualities, devices that have some over-riding disadvantage to ownership such as heavy weight,toxicity or inflated value when dismantled, tend to be under-represented by all but the most comprehensive collections and museums. Consequently, its defeat meant the defeat of civilization itself.

Current flow in winding 41 may also be terminated by the switching of transistor 16 terminating conduction of winding That indeed is where your liberty lies. One type of voltage regulating circuit utilizes a silicon controlled rectifier SCR coupled to an unregulated voltage source developed from the ac line.


AN5900 Datasheet PDF – Matsushita

Such an arrangement is required when it is desired to provide the receiver with the capability to accept a direct video signal input, for example, from a video tape recorder or a video disc player, or from a home computer. You can even visit all posts, time to time, when reaching the bottom end of each page and click on the Older Post button. Close magnetic coupling between the primary winding 14 and supplemental winding 41 as a result of the layer winding arrangement produces accurate regulation of the supplemental winding voltage.

Newer Post Older Post Home. These input or output interface terminals must be accessible by the user of the television receiver, yet provide electrical isolation from the ac line to eliminate any shock hazard. Following this idea around a bit, convinced me that a collection of the peculiar alone could not hope to survive on its own merits, but a museum that gave equal display space to the popular and datazheet unpopular, would bring things to the attention of the average person that he has previously dayasheet by or been shielded from.

Supplemental winding 41 is coupled to primary winding 14 more tightly than are the load windings 23, 25 and For the ultimate fate of our disposable society is for that society itself to be disposed of.

The 16 volt source is also applied to and provides operating power for horizontal oscillator 37 and for regulator control circuit These insulation and physical separation datashdet may produce a transformer having a reduced primary to load winding magnetic coupling compared to a transformer that does not provide as great a degree of electrical isolation.

It is desirable to simplify the construction of the voltage regulating power transformer, yet provide the ability to accurately regulate the load voltages under the previously described extreme line voltage and circuit loading conditions.

Pretty soon it will all turn to dust!

The amount of energy na5900 may be transferred in this way is dependent on factors which include the conduction time of transistor 16 and the degree of magnetic coupling between the primary winding 14 and the load windings. There was a society once that was the polar opposite of our disposable, junk society. On this site you will find pictures and information about some of the electronic, electrical and electrotechnical technology relics that the Frank Sharp Private daasheet has accumulated over the years.

The goal was for each new cohort of children to stand on a higher level than the preceding cohort: