Communication terminal device and amplification circuit

Communication terminal device and amplification circuit

  • CN 1,698,266 B
  • Filed: 03/03/2004
  • Issued: 03/06/2013
  • Est. Priority Date: 03/07/2003
  • Status: Active Grant
First Claim
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1. communication terminal device comprises:

  • Receiving system is used for receiving the transmission power control information in order to the through-put power of controlling transmission information;

    Amplifying device, at least have for the variable gain amplifying apparatus that amplifies and export described transmission information according to the transmission power control information that is received by described receiving system, and be used for amplifying and exporting fixed gain amplifying device from the transmission information of described variable gain amplifying apparatus with fixed gain;

    Supply unit is used for providing electrical power to variable gain amplifying apparatus and the fixed gain amplifying device of described amplifying device;

    Electric energy control device, all the time be provided bias voltage and be in all the time in the situation of negative load condition at the variable gain amplifying apparatus of described amplifying device and fixed gain amplifying device, based on described transmission power control information, the electric current of the described fixed gain amplifying device that offers described amplifying device from described supply unit is carried out bypass process;

    AndConveyer is used for transmitting the described transmission information of being amplified by described amplifying device,It is characterized in that, described electric energy control device has;

    Differential voltage current converter circuit (40), this differential voltage current converter circuit comprises;

    the first transistor (Tr6) and transistor seconds (Tr7), the first MOS transistor (Mos1) and the second MOS transistor (Mos2), wherein the source electrode of the first MOS transistor (Mos1) is connected to described supply unit, drain electrode is connected to its grid and the collector electrode of the first transistor (Tr6), and grid is connected to the grid of the 3rd MOS transistor (Mos3);

    The source electrode of the second MOS transistor (Mos2) is connected to described supply unit, and drain electrode is connected to its grid and the collector electrode of transistor seconds (Tr7);

    The source electrode of the 3rd MOS transistor (Mos3) is connected to described supply unit, and the base stage of at least one is provided described transmission power control information in wherein said the first and second transistors (Tr6, Tr7);

    The first electric current mirror circuit (41), this the first electric current mirror circuit (41) comprises interconnective the 3rd transistor of base stage (Tr8) and the 4th transistor (Tr9), wherein, the emitter grounding of described the 3rd transistor (Tr8), collector electrode is connected to each emitter-base bandgap grading of the first and second transistors (Tr6, Tr7);

    The emitter grounding of described the 4th transistor (Tr9), collector electrode is connected to described supply unit via constant-current source (Iref2), the collector electrode of described the 4th transistor (Tr9) is also connected to the tie point of the base stage of described the third and fourth transistor (Tr8, Tr9);

    AndThe second electric current mirror circuit, (42), this the second electric current mirror circuit, (42) comprise interconnective the 5th transistor of base stage, (Tr10) and the 6th transistor, (Tr11), wherein said the 5th transistor, (Tr10) emitter-base bandgap grading is connected with the power line that is connected to described fixed gain amplifying device from described supply unit concurrently with collector electrode, described the 6th transistor, (Tr11) emitter grounding, collector electrode is connected to its base stage and described the 3rd MOS transistor, (Mos3) drain electrodeWherein offering the electrical power of described fixed gain amplifying device through described power line from described supply unit, process by the electric energy of the electrical power corresponding with the described transmission power control information that offers described differential voltage current converter circuit (40) is carried out bypass, control the electric energy of the electrical power that offers described fixed gain amplifying device.

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