Patent ID: 6658120
Filing Date: 2003-12-02
Classification: H03G

Abstract:
) A method for effecting a polarity-independent transmission system comprising:splitting a generally asymmetric incoming audio signal into positive and negative components; passing the positive component through a variable-gain amplifier to produce a positively sensed output signal; monitoring the output of the variable-gain amplifier; comparing the output of the variable-gain amplifier to a direct current reference bias; assigning a gain factor to the variable-gain amplifier that is predicated on the magnitude of the direct current reference, while concurrently passing the negative component of the incoming signal through a variable-gain amplifier to produce a negatively sensed output signal; monitoring the output of the variable-gain amplifier; comparing the output of the variable-gain amplifier to a direct current reference bias; assigning a gain factor to the variable-gain amplifier that is predicated on the magnitude of the direct current reference; inputting the positively and negatively sensed output signals to a combining amplifier in order to produce a positive and negatively sensed output signal; adjusting each direct current reference so that the peak amplitudes of the positive and negative signals at the output of the combining amplifier comprise a signal that will provide one hundred percent modulation capability to a radio frequency carrier. 2.) A polarity-independent transmission system comprising:a positively sensed signal splitter having an input and an output, the input of the positively sensed signal splitter connected to an incoming signal; a positively sensed variable-gain amplifier having a first and second input and an output, the first input of the variable-gain amplifier connected to the output of the positively sensed signal splitter; a positive peak rectifier diode having an input and an output, the input of the diode connected to the output of the positively sensed variable-gain amplifier; a comparison amplifier having first and second inputs and an output, the first input connected to the output of the positive peak rectifier diode; a direct current reference bias having an output connected to the second input of the comparison amplifier; a low bandpass filter having an input and an output, the input connected to the output of the comparison amplifier and the output connected to the second input of the variable-gain amplifier; a negatively sensed signal splitter having an input and an output, the input of the positively sensed signal splitter connected to the incoming signal; a variable-gain amplifier having a first and second input and an output, the first input of the variable-gain amplifier connected to the output of the negatively sensed signal splitter; a negative peak rectifier diode having an input and an output, the input of the diode connected to the output of the negatively sensed variable-gain amplifier; a comparison amplifier having first and second inputs and one output, the first input connected to the output of the negative peak rectifier diode; a direct current reference bias having an output connected to the second input of the comparison amplifier; a low bandpass filter having an input and an output, the input connected to the output of the comparison amplifier and the output connected to the second input of the variable-gain amplifier; a combining amplifier having a first and second input and an output, the first input connected to the output of the positively sensed variable-gain amplifier and the second input connected to the output of the negatively sensed variable-gain amplifier whereby the output of the combining amplifier comprises a symmetrical signal suitable for modulating a radio frequency carrier. 3.) A method for effecting a polarity-independent transmission system comprising:splitting a generally asymmetric incoming audio signal into positive and negative components; sampling the positive component of the incoming signal; assigning a specific numerical value to the positive component of the incoming audio signal corresponding to its amplitude at the instant of sampling; passing the positive component through an arithmetic multiplication amplifier to produce a positively sensed output stream; monitoring the output stream to determine the positive peak value of the incoming audio signal; assigning an independent multiplication factor; programming the multiplication factor as feedback to the arithmetic multiplication amplifier; sampling the negative component of the incoming signal; assigning a specific numerical value to the negative component of the incoming audio signal corresponding to its amplitude at the instant of sampling; passing the negative component through an arithmetic multiplication amplifier to produce a negatively sensed output stream; monitoring the output stream to determine the negative peak value of the incoming audio signal; assigning an independent multiplication factor; programming the multiplication factor as feedback to the arithmetic multiplication amplifier; combining the positively and negatively sensed output streams.