Electron Tubes

Choke Input Filter and Capacity Input Filter

rectify ['rektifai] выпрямить eliminate [I'limmeit] устранить

A choke input filter and a capacity input filter are used in rectifiers] Filters of this kind are connected to rectifiers in order to eliminate pulsa tions produced in rectified current.

1) Choke input filter is a low-pass filter. A choke coil is in series wiq the rectifier output.

2) Capacity input filter is a high-pass filter. A capacitor is connected directly across or in parallel with the rectifier output.

What is the difference between a choke input filter and a capacity in put filter?

2. Form nouns adding -er and translate them.

Model: to heat - heater

to suppress -

to emit - _ to control -

emitter

emit

Distribute the words below into the three columns.
Model: action process doer

emission

collector, heat, collection, suppress, collect, suppressor, suppression, con­tain, reaction, container, react, heater, reactor, computer, compute, oscil­late, oscillating, oscillator

4. Read the words and put down their Russian equivalents. Then trans­late them back into English.

diode [daiad] triode [traiad] tetrode [tet'roud] pentode [pen'toud]

cathode ['kaeGoud]

metal ['metl]

glass [gla:s]

oscillator ['osileita]

1. a) Cover the right column and read the English words. Translate them into Russian and check your translation.

b) Cover the left column and translate the Russian words back into English.

tube	[tju:b]	электронная лампа
bulb	[Ьл1Ь]	баллон
grid		сетка
screen		экран
to contain	[kan'tem]	вмещать
to collect	[ka'lekt]	собирать
to emit	[i'mit]	излучать
to suppress	[sa'pres]	глушить, подавлять
control circuit		контрольная цепь
control grid		управляющая сетка
screen grid		экранирующая сетка
screen grid tube		экранированная лампа
suppressor grid		защитная сетка
counter flow		противоток
oscillatory circuit		колебательный контур

Let us consider electron tubes. Among the electron tubes in use nowadays there are a diode, a triode, a tetrode and a pentode. The main parts of electron tubes are electrodes. Electrodes are placed into a glass or metal bulb.

а- -щ

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