CH and CL Series Power Amplifiers
5 Principles of Operation
The signal next enters the main amplifier error amp where it is mixed with a small portion of the output voltage and current in such a way as to control the amplifier’s overall output perfor- mance.
Following the error amp is the modulator stage where the audio signal is compared to an extremely accurate
The signals from the optos are then passed to gate drivers that amplify the pulses to the level required to drive output devices. The driven
output devices are now able to produce PWM pulses that have an output voltage from the negative
The amplified audio signal is then passed through an output filter that removes the resid- ual ripple voltage.
Protection for the output devices is performed by a very precise
The
Thermal probes monitor Heatsink tempera- tures and power transformer temperature. As the temperatures rise, the probes send a pro- portional voltage to the fan control circuit and the Thermal Limit Control (TLC) circuit. The fan
Figure 5.4 Model CL4 Circuit Block Diagram
page 26 | Operation Manual |