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Description The circuit shown illustrates a mixer with several participation coming from 3 line inputs and 3 microphone inputs utilizing easily ready elements. In electronics terms, a mixer is a device used to merge two or more electronic signals into one complex output. From electronic devices, mixers may be classified as electronic mixer, frequency mixer, mode mixer, vision mixer, or audio mixing console. There are two types of mixers, additive and multiplying The circuit may be described as heterogeneous in a sense that the system has multiple identical inputs, 3 from line and 3 from microphones. The use of relatively cheap dynamic microphones are appropriate enough due to low impedance. Recording application condenser microphones are also preferred in series with a resistor because of its overall frequency response. To conquer any loss, which is normal in any mixer, the total amplifier gain should be from 2 to 6 dB together with 200mV root mean square. The mixer circuit produces a total gain of 46dB because of the 100 times amplified signal of inputs amounting to 40 dB. Using a power supply will prolong the life expectancy of the circuit operation. Application
Appreciating mixers will aid figuring the concept of modulation process of amplitude modulation (AM) transmitters. Mixers are usually an ingredient in changing the frequency in radios. Source:www.zen22142.zen.co.uk/Circuits/Audio/6ipmix.htm
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