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Anglicky v odborných předmětech "Support of teaching technical subjects in English“

Anglicky v odborných předmětech "Support of teaching technical subjects in English“. Educational program: Mechanic - electrician Title of program: Technical training II. class RC oscillator Worked out: Bc . Chumchal Miroslav.

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Anglicky v odborných předmětech "Support of teaching technical subjects in English“

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  1. Anglicky v odborných předmětech"Support of teaching technical subjects in English“ Educational program: Mechanic - electrician Title of program: Technical training II. class RC oscillator Worked out: Bc. Chumchal Miroslav Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/04.0002 je spolufinancován Evropským sociálním fondem a státním rozpočtem České republiky.

  2. Oscillators • Scheme of the RC oscillator • Components specification • Recessing drawing from the side of elements • Recessing drawing from the side of joints • Description of connection • Students activities

  3. The RC oscillator

  4. Components specification

  5. Recessing drawing

  6. Recessing drawing from the side of joints

  7. Description of connection • Signal from the collector T1 is bringing across the four- pole composed from capacitors and resistors on base of the transistor. The four- pole moved round slight of signal phase about1800. • The value of the four- pole components determining a frequency on which the oscillator oscillating. • The operating point of transistor is positioning by resistor R4. • The signal is withdrawing from the collector T1 across a coupling capacitor Cv. • The oscillator is supplying by ss. voltage 4,5V and taking from source a current about 1,5 mA.

  8. Students activities – control questions • Explain function of nf. oscillator. • For what is a resistor R4 in a scheme. • Explain a procedure of measuring by Lissajous figures.

  9. Practice students activities • Draw a block scheme for measuring of progress of nf. signal. • Use a Lassajous figures for finding a oscillator frequency . • Take down a voltage dependence on frequency to the graph.

  10. Literature used • Vlastní poznámkový sešit • www.wikipedia.org/wiki/nf oscilátory

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