Radio telephone apparatus and method for controlling amount of electric current consumption thereof
View Patent ↗A radio telephone apparatus includes a transmission section that transmits a radio wave, a consumption section that consumes an amount of an electric current equal to that consumed by the transmission section, and a control section that controls activations of the transmission section and the consumption section. The control section activates the consumption section to consume the amount of the electric current during the period when the transmission section is not activated.
1. A radio telephone apparatus, comprising:
a transmission section that transmits a radio wave;
a consumption section that consumes electric current; and
a control section that activates the consumption section to consume the electric current during a period when the transmission section is not activated and that deactivates the consumption section during a period when the transmission section is activated,
wherein the control section generates a transmission section enable signal for controlling an activation and a halt of the transmission section and a consumption section enable signal for controlling an activation and a halt of the consumption section, and
wherein the control section delays a timing of transmitting the consumption section enable signal for halting the consumption section with respect to a timing of transmitting the transmission section enable signal for activating the transmission section when the control section activates the transmission section so that a change of a sum of amounts of electric currents consumed by the transmission section and the consumption section is reduced during a transition from a halting state of the transmission section to an activating state of the transmission section.
2. The radio telephone apparatus as set forth in claim 1 , wherein the control section delays a timing of transmitting the consumption section enable signal for activating the consumption section with respect to a timing of transmitting the transmission section enable signal for halting the transmission section when the control section halts the transmission section so that a change of a sum of amounts of electric currents consumed by the transmission section and the consumption section is reduced during a transition from an activate state of the transmission section to a halting state of the transmission section.
3. The radio telephone apparatus as set forth in claim 1 , wherein the consumption section includes:
a receiving section for receiving a radio wave; and
a first load circuit for consuming an amount of a difference electric current between the amount of the electric current consumed by the transmission section and the amount of the electric current consumed by the receiving section; and
wherein the control section activates the receiving section and the first load circuit during the period when the transmission section is not activated.
4. The radio telephone apparatus as set forth in claim 3 , wherein the control section generates a transmission section enable signal for controlling an activation and a halt of the transmission section, and a consumption section enable signal for controlling an activation and a halt of the consumption section; and
wherein the consumption section enable signal includes a receiving section enable signal for controlling an activation and a halt of the receiving section and a first load enable signal for controlling an activation and a halt of the first load circuit.
5. The radio telephone apparatus as set forth in claim 1 , wherein the consumption section includes:
a receiving section for receiving a radio wave;
a second load circuit for consuming an amount of an electric current equal to that consumed by the transmission section; and
a third load circuit for consuming an amount of a difference electric current between the amount of the electric current consumed by the transmission section and the amount of the electric current consumed by the receiving section; and
wherein the control section activates the second load circuit or both of the receiving section and the third load circuit to consume the amount of the electric current during the period when the transmission section is not activated.
6. A method for controlling an amount of electric current consumed by a radio telephone apparatus that includes a transmission section and a consumption section the method comprising:
activating the transmission section for transmitting a radio wave;
activating the consumption section to consume electric current during a period when the transmission section is not activated;
deactivating the consumption section during a period when the transmission section is activated;
generating a transmission section enable signal for controlling an activation and a halt of the transmission section;
generating a consumption section enable signal for controlling an activation and a halt of the consumption section; and
delaying a timing of transmitting the consumption section enable signal for halting the consumption section with respect to a timing of transmitting the transmission section enable signal for activating the transmission section when die control section activates the transmission section so that a change of a sum of amounts of electric currents consumed by the transmission section and the consumption section is reduced during a transition from a halting state of the transmission section to an activating state of the transmission section.
7. The method as set forth in claim 6 , further comprising:
delaying a timing of transmitting the consumption section enable signal for activating the consumption section with respect to a timing of transmitting the transmission section enable signal for halting the transmission section when the control section halts the transmission section so that a change of a sum of amounts of electric currents consumed by the transmission section and the consumption section is reduced during a transition from an activate state of the transmission section to a halting state of the transmission section.
8. A radio telephone apparatus, comprising:
a transmission section configured to transmit a radio wave;
a consumption section configured to consume an amount of an electric current substantially equal to that consumed by the transmission section; and
a control section configured to generate a transmission section enable signal for controlling an activation and a halting of the transmission section and a consumption section enable signal for controlling an activation and a halting of the consumption section,
wherein the control section transmits the consumption section enable signal for halting the consumption section after transmitting the transmission section enable signal for activating the transmission section so that a change of a sum of amounts of electric current consumed by the transmission section and the consumption section is reduced from a halting state of the transmission section to an activating state of the transmission section.
9. The radio telephone apparatus set forth in claim 8 , wherein the consumption section able signal includes a receiving section able signal for controlling an activation and a halt of the receiving section and a first load enable signal for controlling an activation and a halt of the first load circuit.