Power source circuit and communication appts. having same

A technology for power circuits and communication equipment, which is applied in the field of power circuits and communication equipment, and can solve the problems of weakening the portability of portable cellular phones and the large size of portable cellular phones

Inactive Publication Date: 2004-08-11
ENVISION AESC ENERGY DEVICES LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If all these components are included in a portable cellular phone, the portable cellular phone will become very large and heavy, thereby reducing the portability of the portable cellular phone

Method used

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  • Power source circuit and communication appts. having same
  • Power source circuit and communication appts. having same
  • Power source circuit and communication appts. having same

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0089] figure 1 is a schematic block diagram showing the electrical configuration of a communication device equipped with the power supply circuit of the first embodiment of the present invention. Such as figure 1 As shown, the communication device of the first embodiment is a portable cellular phone, and includes an antenna 41, an antenna switch 42, a receiver 43, a local oscillator 44, a transmitter 45, a wireless section interface 46, a man-machine interface section 47, and a power supply Circuit 48. The antenna 41 is used to transmit radio waves to and receive radio waves from a wireless base station (not shown), and the length of the antenna is set according to the wavelength of the radio waves used for communication. The antenna switch 42 selects either the receiver 43 or the transmitter 45 in order to establish a connection with the antenna 41 .

[0090] The receiver 43 performs amplification, and / or frequency conversion, etc. on the received signal. The local osc...

no. 2 example

[0138] Figure 10 is a schematic block diagram showing the electrical configuration of the portable cellular phone according to the second embodiment of the present invention. exist Figure 10 , assign the same reference notation to the figure 1 The same functional counterpart of the first embodiment shown. The portable cellular phone of this embodiment has a figure 1 The wireless section interface 46A and the human-machine interface section 47A of the wireless section interface 46 and the human-machine interface section 47 used in the first embodiment shown, each of the wireless section interface 46A and the human-machine interface section 47A adds a new function, in addition, the portable cellular phone of this embodiment also newly includes: a PAD (Personal Digital Assistant) function block 141 . In the PDA functional block 141, an operating system (OS) is installed, and software is installed. Each of the wireless part interface 46A and the man-machine interface part...

no. 3 example

[0142] Figure 11 is a schematic block diagram showing the electrical configuration of a portable cellular phone according to a third embodiment of the present invention. The portable cellular phone of the third embodiment has a figure 1 The digital interface 142 of the human machine interface 47 is shown. The digital interface 142 is connected to a personal computer 143 through, for example, a USB (Universal Serial Bus) port or a PC (Personal Computer) card slot. The PC card slot complies with PCMCIA (Personal Computer Memory Card International Association).

[0143] In the portable cellular phone of the third embodiment, in general, power is supplied from the personal computer 143, and if the personal computer 143 is such as a battery-driven notebook PC, by using the power supply circuit 48, the communication time according to the TDMA system can be extended. In addition, when using a power supply such as a USB-type bus power supply in which output current is limited as ...

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Abstract

A power circuit is provided which is capable of lengthening use time of a battery in a portable communication terminal of a TDMA (Time Division Multiple Access) or TDD (Time Division Duplex) type portable communication devices, and of making them compact and lightweight. Since, by using a control circuit, an output current having been limited to become a pre-set current value is supplied from the battery to a transmission power amplifier and an electrical double layer capacitor is charged so that power is accumulated therein and since power is applied from the electrical double layer capacitor to both the control circuit and the transmission power amplifier, even if power consumption of the transmission power amplifier increases during a burst period, a drop of the output voltage from the battery is small. Therefore, time required for the output voltage to reach a terminating voltage in the battery is made longer and a life of the battery can be lengthened. Also, even if the battery is put under a low-temperature circumstance and its internal resistance increases, shortening of the life of the battery can be avoided.

Description

technical field [0001] The present invention relates to a kind of power supply circuit, and have the communication equipment of this power supply circuit, more particularly, the present invention relates to a kind of portable cell phone etc. A power circuit used in and relates to a communication device having the power circuit. [0002] This application claims the benefit of Japanese Patent Application No. 2003-030454 filed on February 7, 2003, and Japanese Patent Application No. 2003-183617 filed on June 26, 2003, which are incorporated herein in their entirety Reference. Background technique [0003] In a conventional portable communication device (such as a portable cellular phone) employing a TDMA or TDD communication method, after having been amplified by a transmission power amplifier, there will be a transmission signal with burst periods and non-burst periods alternately appearing in a repeated manner Sent as transmitted radio waves. During the burst period, the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04M1/73H01G9/00H02J7/34H04B1/04H04B1/16H04B1/40H04B7/26H04M19/08H04W52/00H04W88/02
CPCH01G9/155H02J7/345H04B1/1607H04M19/08Y02E60/13H01G11/08H01G11/14H04B1/40
Inventor 佐佐木浩
Owner ENVISION AESC ENERGY DEVICES LTD
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