Educational program: Mechanic - electrician Title of program: Technical training II. class RC oscillator Worked out: Bc. Chumchal Miroslav Projekt Anglicky.

Prezentace na téma: "Educational program: Mechanic - electrician Title of program: Technical training II. class RC oscillator Worked out: Bc. Chumchal Miroslav Projekt Anglicky."— Transkript prezentace:

1

2 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.

3  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

4

5 Component Value R1-R4 1K5 R5 M1 Rc 2K7 C1-C3 M1 Cv 5M T1 BC 548 ( NPN ) Ucc 5V

6

7

8  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 about180 0.  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.

9 Explain function of nf. oscillator. For what is a resistor R4 in a scheme. Explain a procedure of measuring by Lissajous figures.

10 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.

11  Vlastní poznámkový sešit  www.wikipedia.org/wiki/nf oscilátory www.wikipedia.org/wiki/nf