Abstract: The present invention relates to the use of a recorder that is part of a vehicle entertainment system (VES) for recording audio programming and accessing recorded audio programming, where external controls for the recorder may be located on the steering wheel of the vehicle, allowing a driver to safely configure the VES for recording audio programming and accessing the recorded audio programming.

Abstract: The present invention relates to the use of a power control module with a recorder for recording audio programming and accessing audio programming that is part of a vehicle entertainment system (VES) where the power control module assures the energy used by the recorder when the vehicle is off does not drain the power supply beyond a predetermined level.

Abstract: Disclosed is a system and method for compensating for the effects of aging and temperature on the performance of transistors in an RF transmitter. The system and method use a temperature-based polynomial and a feedback control loop to correlate the drain current of each transistor with the desired performance characteristics of each transistor. The present invention measures drain current and temperature of the transistor; compares the measured drain current with the desired drain current, which corresponds to the desired performance characteristics; computes a transistor bias voltage based on the temperature and a control parameter, wherein the control parameter is adjustable based on the measured drain current; and applies the bias voltage to the transistor. The process may be repeated, with the control parameter adjusted with each iteration, until the desired drain current is reached.