Slide 2 Educational program: Mechanic electrician Program title:
Technical training II. class Correction amplifier Worked out: Bc.
Chumchal Miroslav Projekt Anglicky v odbornch pedmtech,
CZ.1.07/1.3.09/04.0002 je spolufinancovn Evropskm socilnm fondem a
sttnm rozpotem esk republiky. Slide 3 Scheme of connection T3 in
correction amplifier Connection of corrections of amplifier
Description of function of correction amplifier Components
specification of amplifier Common unit of voltage and correction
amplifier Students activities Slide 4 Slide 5 Slide 6 - Regulation
of depth and pitch ( adapt to peculiarities of human hearing) - The
main part of correction amplifier are circuits made up with R- C
elements - Regulation of pitch level regulating by P1, depth level
by P2 - Small capacity give a big resistance to medium and low
frequency. High is OK. - High level of frequency badly came through
by a big resistance. Low level of frequency is OK. - Signal from
output of voltage amplifier come over the P1, separating R2 and P2.
The end of the resistance line P1 and P2 is connected by Cv to the
point where is the opposite phase of signal, leads to reduction. It
is because the part of potentiometer line interfering to the
circuit of feedback bond, leading from T3 output across R4 on input
T3 - For the good working of the whole correction amplifier, their
input have to be connected to the small output resistance of pre-
amplifier and output of the amplifier is not to be allowed loading
by small input resistance of the ending stage. Slide 7 Components
Value R1 4K7 R2 4k7 R3 22k R4 1K P1 50K/N P2 50K/N C1,C2 68n C3 2n2
Slide 8 - The voltage and the correction amplifier - Filtration
element in circuit of power supply voltage, preventing of feedback
bond and vibrationing the whole amplifier. - To prevent of
overexcited of the amplifier, set up by trimmer on input such a
input level that the signal during the operating of the
potentiometer would not be distortion. - T3 has got a small power
supply voltage like the level before- 13V. - During the setting of
working point is giving, that T3 has setting of working point with
the assistance of divider in base T. - Max. Uvst=4V - Icc = 5mA -
Unap.=15V - Uce=20V Slide 9 For what the correction amplifier is
working for us? What function of the voltage unit is, and where is
this unit connected? What class of amplifiers using at the
correction amplifiers do you know? What meaning has got the
indicate of the N and G at the potentiometer behind a value, for
example 50K/N or M1/G. Slide 10 Design a connection of corrections
on a graph paper according to the photo number 4. This connection
realize on a printed wiring and take their measurement. Slide 11
Poznvme Elektroniku I.,Vclav Malina, Vydalo nakladatelstv KOPP,esk
Budjovice, 1996 Vlastn poznmkov seit