Electroacoustic transducer for loudspeaker with horn incorporates amplifier with negative output impedance and has power amplifier with negative feedback via resistor

摘要

The electroacoustic transducer for a loudspeaker has two input terminals (Input). They are connected respectively to the positive terminal of a power amplifier (Power Amp) and to earth. The negative terminal of the power amplifier is connected to its output via a resistor (R4). The power amplifier output is connected to one of the terminals of the loudspeaker (R-load). The other terminal is connected to earth via a resistor (R-shunt), also to the negative terminal of an inverter (OP1) via a resistor (R1). The positive terminal is connected to earth and there is a feedback to the negative terminal via a resistor (R2). The output is connected to the negative terminal of the power amplifier via a resistor (R3).