intercom circuit
Source: InternetPublisher:刘德华河北分华 Keywords: Amplifier power communication power supply Updated: 2020/08/23
The circuit is made up of several independent amplifiers, one at each console, rather than being separate amplifiers or located in a time-sharing arrangement. U1 and U2 are low voltage audio amplifiers used as independent units and switches on each receive position controller. The circuit contains capacitors C7 and C8 and the amplifier has a gain of 200.
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