Power amplifier e.g. power D amplifier, for reproducing sound, has switch with two contacts which are connected with positive and negative terminals of power source, respectively, where another contact is connected to input of summator
摘要
<p>The amplifier has a comparator (25) with an input and output connected with an input and output of a pulse width modulator (1), respectively. A summator (22) has an input connected with a contact (28) of a switch (21). An output of the summator is connected with an input of a Schmitt trigger (23). An output of the Schmitt trigger is connected with an input of an integrator and with a control input of the switch. Another two contacts (26, 27) of the switch are connected with positive and negative terminals of a power source, respectively.</p>
