Patent ID: 7107024
Filing Date: 2006-09-12
Classification: H03C,H04B

Abstract:
1. A system adapted to eliminate undesired sounds during turn on of a FM modulator, the FM modulator having a RF output signal in communication with a radio receiver, a VCO modulation input, and a composite output signal, the system comprising: a RF attenuator circuit in communication with the RF output signal of the FM modulator and adapted to initially reduce the RF output signal; a RF ramp up circuit in communication with the RF attenuator circuit and adapted to deactivate the RF attenuator circuit; a delay switch circuit in communication with the RF ramp up circuit and adapted to delay activation of the RF ramp up circuit; and an audio ramp up circuit in communication with the RF ramp-up circuit and the composite output Signal at the FM modulator, the audio ramp up circuit increasing the composite output signal.