RE: 774

"Overall system design is based on the use of a microprocessor which can drive all system components. This eliminates the need for use of multiple interface logic that demands a lot of board space within the circuitry. The DSP or digital support processor is coupled to the microprocessor and to a CODEC for coding and decoding the analog signal received from the microphone or transmitted to the speaker. Codec also performs the analog to digital conversion. It functions to receive the analog signal input and convert it to PCM or pulse code modulation and then feed this signal to"

Moving freely between circuits is the power of this patent.....in other words utilizing an analog memory (claim 19 and related issues) or a digital memory (claim 1and related issues) is not a problem. Implementing select device issues is not a problem.

FIG. 5 illustrates the circuitry for supplying variable voltage. Three power out lines 61, 62, and 63 are driven by the microprocessor. Signals from these power sources go to electrical switches such as MOSFET devices 64, 65, 66 that distribute power to different parts of the circuitry. Generally, this occurs after the DC to DC converter has been switched on and is producing 5 volts for general operation.

"such as" ....not necessarily having to be..... They have identified a simplest level that can function in this embodiment as a switching device...it can be others.

"distribute power" from a second dedicated power source......the power from the micro-controller three power out lines 61, 62, and 63 to the MOSFETs do not power device components. The Mosfets act as relays distributing the secondary power source to device issues.

"It will be apparent to those skilled in the art that numerous modifications to circuitry and design could be made the to embodiment disclosed herein. It is to be understood that such modifications are intended to be comprehended within the present invention, as defined by the following claims."

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