Mobile unit communication apparatus having digital and analog communication modes and a method of controlling the same

• US 6,304,761 B1
• Filed: 04/30/1997
• Issued: 10/16/2001
• Est. Priority Date: 05/31/1996
• Status: Expired due to Fees

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Tsunehiro, Naoshi
• Primary Examiner(s): Chang, Vivian
• Assistant Examiner(s): APPIAH, CHARLES NANA
• Application Number:
  US08/841,106
• Time in Patent Office: 1,630 Days
• Field of Search: 455/552, 455/553, 455/38.3, 455/574, 455/127, 455/343, 455/572, 455/422
• US Class Current: 340/7.32
• CPC Class Codes: H04B 1/406 with more than one transmission mode, e.g. analog and digital modes

Abstract

A mobile unit communication apparatus (COMM APP) having digital and analog transmission (XMSN) modes is disclosed, which comprises: a radio wave XMSN and receiving portion including an antenna for transmitting digital and analog XMSN signals in the digital and analog XMSN modes respectively; a signal (SIG) processing portion including a DSP portion and an ASIC portion for processing the received digital and analog XMSN SIGs in the digital and analog COMM modes respectively; an input and output portion for inputting an input SIG and outputting an output SIG from the digital XMSN SIG from the digital processing portion in the digital COMM mode and from the analog XMSN SIG from the ASIC portion in the analog COMM mode; and a supply power saving portion for operating the ASIC portion and not operating the digital SIG processing portion in the analog COMM mode to reduce a consumption of the supply power. This APP may further comprise: a waiting condition detection portion for detecting a waiting condition and a clock SIG control portion for decreasing a frequency of the clock SIG supplied to the ASIC portion in the analog COMM mode in the waiting condition. This APP intermittently stops supplying the supply power to the ASIC portion for a given interval when it is detected that two successive words in a data stream in forward control channel includes the same data and corresponding method is also disclosed.

Claims

1. A mobile unit communication apparatus having digital and analog communication modes, comprising:

radio wave transmission and receiving means including an antenna for transmitting and receiving digital and analog transmission signals in said digital and analog communication modes respectively;

signal processing means including separate processing portions comprising a digital signal processing (DSP) portion for processing said received digital transmission signal in said digital transmission mode and an application specific integrated circuit (ASIC) portion including digital circuits for processing said analog transmission signal from said radio wave transmission and receiving means in said analog communication mode with non-programmed processing in response to a clock signal whose frequency is necessary for said non-programmed processing;

input and output means for inputting an input signal and outputting an output signal from said digital transmission signal from said digital signal processing portion in said digital communication mode and from said analog transmission signal from said application specific integrated circuit portion in said analog communication mode, said digital signal processing means further processing said input signal which is transmitted by said radio wave transmission and receiving means in said digital communication mode, said application specific integrated circuit portion further processing said input signal which is transmitted by said radio wave transmission and receiving means in said analog communication mode;

power supply means including a battery for supplying a supply power; and

supply power saving means for operating said ASIC portion and not operating said digital signal processing portion in said analog communication mode to reduce consumption of said supply power.

2. A mobile unit communication apparatus as claimed in claim 1, further comprising:

waiting condition detection means for detecting a waiting condition of reception and transmission of a call, said application specific integrated circuit portion being responsive to a clock signal; and

clock signal control means for decreasing a frequency of said clock signal supplied to said ASIC Portion in said analog communication mode when said waiting condition detects said waiting condition.

3. A mobile unit communication apparatus as claimed in claim 1, wherein said analog transmission signal includes a forward control channel repeatedly bearing data stream, each including top data and recurrent words, each including predetermined data, said mobile unit communication apparatus further comprising:

data detecting means for detecting data of two successive said recurrent words;

comparing means for comparing detected data of two successive words following said top data from said data detecting means; and

supply power controlling means for stopping supplying said supply power to said application specific integrated circuit portion for a predetermined interval before the next top data when said detected data of said two successive recurrent words agree with each other.

4. The mobile unit communication apparatus as claimed in claim 1, wherein said supply power saving means reduces consumption of said supply power by operating said ASIC portion and not operating said digital signal processing portion in said analog communication mode such that high speed operation and power consumption of said digital signal processing portion in said analog communication mode is avoided.

6. The mobile unit communication apparatus as claimed in claim 1, wherein said supply power saving means reduces consumption of said supply power by operating said ASIC portion and not operating said digital signal processing portion in said analog communication mode such that said digital signal processing portion is not operated in said analog communication mode which would require a higher drive current than the drive current for the ASIC portion operated in the analog communication mode.

5. A method of controlling a mobile unit communication apparatus having digital and analog communication modes, comprising the steps of:

providing a radio wave transmission and receiving portion including an antenna for transmitting digital and analog transmission signals in said digital and analog communication modes respectively;

providing a signal processing portion including a digital signal processing (DSP) portion and an application specific integrated circuit (ASIC) portion for processing said received digital and analog transmission signals in said digital and analog communication modes respectively;

providing an input and output portion for inputting an input signal and outputting an output signal from said digital transmission signal from said digital processing portion in said digital communication mode and from said analog transmission signal from said application specific integrated circuit portion in said analog communication mode, said digital signal processing portion further processing said input signal which is transmitted by said radio wave transmission and receiving portion in said digital communication mode, said application specific integrated circuit portion further processing said input signal which is transmitted by said radio wave transmission and receiving portion in said analog communication mode;

providing a power supply portion including a battery for supplying a supply power, said analog transmission signal including a forward control channel repeatedly bearing data stream, each including top data and recurrent words, each including predetermined data;

detecting data of two successive said recurrent words;

comparing detected data of two successive words following said top data from said data detecting portion; and

stopping supplying said supply power to said application specific integrated circuit portion for a predetermined interval before the next top data when said detected data of said two successive recurrent words agree with each other.