US 6,983,052 B2
Vehicle power amplifier and voltage supply thereof
Jason Kemmerer, Thousand Oaks, Calif. (US); Michinao Asano, Tokyo (Japan); and Katsuhisa Shimizu, Iwaki (Japan)
Assigned to Alpine Electronics, Inc, Tokyo (Japan)
Filed on Dec. 29, 2001, as Appl. No. 10/36,776.
Prior Publication US 2003/0123678 A1, Jul. 03, 2003
Int. Cl. H04B 1/00 (2006.01)
U.S. Cl. 381—86 9 Claims
OG exemplary drawing
 
5. A vehicle power amplifier having an audio characteristics compensation function, comprising:
an adjustment and compensation controller for applying the audio characteristics compensation function to an input audio signal, the adjustment and compensation controller including a microcomputer for controlling an overall operation of the vehicle power amplifier;
a voltage supply for supplying source voltages to blocks in the vehicle power amplifier;
a memory for storing information which specifies either a first mode or a second mode at power on where the first mode is a mode to supply the source voltages only to blocks involved in setting the compensation functions and adjustment values, and the second mode is a mode to supply the source voltages to the entire vehicle power amplifier; and
a power amplifier unit for amplifying the audio signal from the adjustment and compensation controller and supplies the resultant audio signal to a speaker;
wherein the microcomputer causes to store the information indicating the first mode in the memory before shipment of the vehicle power amplifier and the information indicating the second mode in the memory after setting on/off operation of compensation functions and associated adjustment values in the first mode.