Electronic signal switch on the TDA1029 chip. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Electronic signal switch on the TDA1029 chip. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Preamplifiers

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Now we will take a look at the TDA1029 chip manufactured by a small European company Philips. This small European company has a small division for the production of small semiconductor devices. I myself was very surprised - it turned out that Philips produces something else besides mobile phones and other household rubbish. As some of our colleagues say, there is an Internet presence - semiconductors.philips.com.

Yes, to the point.

The above microcircuit is a signal selector for various amplifiers. The 16-leg case accommodates 4 stereo inputs and 1 stereo output.

The main parameters

Supply voltage	In 6-23
Current consumption	3,5 mA
Coeff. amplification	1
Coeff. harmonics	0,01%
Signal to noise ratio	120 dB

All in all, it's pretty good, isn't it? The following goodies are also built into the microcircuit: silent switching of inputs, protection of the output from short circuits.

We look at the wiring diagram

(click to enlarge)

printed scarf

In principle, there is nothing special to comment on. To the left of us are the entrances to the right - the exit. Also on the right are the output switches. If none of the switches is closed, then the signal is taken from the first input - the top one according to the scheme. If one of the switches closes, then the selector switches to the corresponding state. Switches can be of any type - no sound signal passes through them, so you can put whatever comes to mind - that's what an electronic switch is good for - it has no contacts that oxidize or grind over time. Very comfortable in every way. We solder and use.

Publication: radiokot.ru

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