JP2006271112A - Power supply device for power amplifier - Google Patents

Power supply device for power amplifier Download PDF

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JP2006271112A
JP2006271112A JP2005085630A JP2005085630A JP2006271112A JP 2006271112 A JP2006271112 A JP 2006271112A JP 2005085630 A JP2005085630 A JP 2005085630A JP 2005085630 A JP2005085630 A JP 2005085630A JP 2006271112 A JP2006271112 A JP 2006271112A
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voltage
battery
power supply
power amplifier
power
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Shigeo Kusunoki
繁雄 楠
Masanaga Hatsuya
匡長 初谷
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Sony Corp
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Sony Ericsson Mobile Communications Japan Inc
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract

<P>PROBLEM TO BE SOLVED: To use electric power efficiently, even when a battery having comparatively large voltage drop rate is used. <P>SOLUTION: A voltage detection portion 13 compares a voltage of the battery 11 with a predetermined reference voltage. When the battery voltage is higher than the reference voltage, a step-down voltage conversion portion 14 is put into an operating state, and a switch 12 into a non-conducting state. When the battery voltage is equal to or lower than the reference voltage, the voltage conversion portion 14 is switched to a no-operating state, and the switch 12 to a conducting state. It is also possible to reverse the polarity of an output of the voltage detection portion 13, by using the voltage conversion portion 14 of a step-up type. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、電力増幅器用電源装置、特に携帯電話機のような携帯端末装置に使用して好適な高周波電力増幅器用電源装置に関する。   The present invention relates to a power amplifier power supply device, and more particularly to a high frequency power amplifier power supply device suitable for use in a mobile terminal device such as a mobile phone.

第３世代と呼ばれる携帯電話サービスがほぼ普及しつつある現在、これに更にアプリケーションと呼ばれる多くのサービスが付加されつつある。そこで、電池の消耗時間が大きな課題となってきている。現在実用化されている炭素電極を用いたリチウムイオン電池の容量は理論限界に達している。   At present, mobile phone services called third generation are almost prevalent, and many services called applications are being added to this. Thus, battery consumption time has become a major issue. The capacity of lithium ion batteries using carbon electrodes that are currently in practical use has reached the theoretical limit.

一方、合金電極を用いたリチウムイオン電池は５０％程度の容量増加が見込まれるが、その一方で、後述するような電圧低下の課題がある。携帯電話機に使用される部品のうち電力増幅器の所要電圧は３．５Ｖであり、これは１０年来変わっていない。このままでは、電力増幅器の限界に起因して、折角の電池容量の増加が有効に機能しないという事態が生じることになる。   On the other hand, lithium ion batteries using alloy electrodes are expected to have a capacity increase of about 50%, but on the other hand, there is a problem of voltage reduction as described later. Of the parts used in mobile phones, the required voltage of the power amplifier is 3.5V, which has not changed for 10 years. In this state, due to the limitation of the power amplifier, a situation occurs in which the increase in the battery capacity at the corner does not function effectively.

特許文献１には、外部電源電圧が５Ｖであっても３．３Ｖのどちらの外部電源電圧を使用しても、高速の動作速度と安定な作動を行う半導体装置が提案されている。具体的には、外部電源電圧を検出し、外部電源電圧が５Ｖである場合は降圧回路によって３．３Ｖに降圧された内部電源電圧を内部回路に供給し、外部電源電圧が３．３Ｖである場合には外部電源電圧をそのまま内部回路に供給する。
特開平６−１４９３９５号公報 Patent Document 1 proposes a semiconductor device that operates at a high speed and operates stably regardless of whether the external power supply voltage is 5V or 3.3V. Specifically, the external power supply voltage is detected, and when the external power supply voltage is 5V, the internal power supply voltage stepped down to 3.3V by the step-down circuit is supplied to the internal circuit, and the external power supply voltage is 3.3V. In this case, the external power supply voltage is supplied to the internal circuit as it is.
Japanese Patent Laid-Open No. 6-149395

図２に、従来の炭素電極系リチウムイオン電池と合金電極系リチウムイオン電池の特性の違いをグラフとして示す。図中、ＴｙｐｅＡと記した炭素電極電池は電池電圧が長時間に亘って３．５Ｖ一定を保持し、使いやすい。しかし、現状ではその容量は理論限界に達しており、その増加は困難である。   FIG. 2 is a graph showing the difference in characteristics between a conventional carbon electrode type lithium ion battery and an alloy electrode type lithium ion battery. In the figure, the carbon electrode battery denoted as Type A is easy to use because the battery voltage remains constant at 3.5 V for a long time. However, the capacity has reached the theoretical limit at present, and its increase is difficult.

一方、ＴｙｐｅＢと記した合金電極電池では、その容量は最大５０％もの増加が見込まれ有望である。しかし、使用開始時から時間とともに電池電圧が徐々に低下し、約２．７Ｖにまで低下する。現在携帯電話機に使用する電力増幅器は、電源電圧３．５Ｖを要するので、電池電圧が早期に３．５Ｖまで低下するＴｙｐｅＢの合金電極電池は使えない。   On the other hand, an alloy electrode battery denoted as Type B is promising because its capacity is expected to increase by up to 50%. However, the battery voltage gradually decreases with time from the start of use and decreases to about 2.7V. Since the power amplifier currently used for a mobile phone requires a power supply voltage of 3.5 V, a Type B alloy electrode battery in which the battery voltage drops to 3.5 V at an early stage cannot be used.

この問題に対して、２．７Ｖで動作できる電力増幅器を使用することが考えられるが、電池電圧の高いところで動作させると、効率が極端に低下するという問題がある。   To solve this problem, it is conceivable to use a power amplifier that can operate at 2.7 V. However, if it is operated at a high battery voltage, there is a problem that the efficiency is extremely lowered.

また、上記特許文献１に記載の技術は電池電圧の広い範囲を有する電池に対応するために利用することも考えられるが、その降圧回路は常に動作しており効率の観点から改善の余地がある。   Further, although the technique described in Patent Document 1 may be used to deal with batteries having a wide range of battery voltages, the step-down circuit always operates and there is room for improvement from the viewpoint of efficiency. .

本発明はこのような背景においてなされたものであり、その目的は、電圧の降下幅が比較的大きい電池を用いた場合にも効率的な電力使用を行うことができる電力増幅器用電源装置を提供することにある。   The present invention has been made in this background, and an object of the present invention is to provide a power amplifier power supply device that can efficiently use power even when a battery having a relatively large voltage drop is used. There is to do.

本発明による第１の電力増幅器用電源装置は、電池を動作電源とする電力増幅器のための電源装置であって、電池電圧を降圧する電圧変換部と、電池電圧を前記電力増幅器へ直接供給するためのスイッチ部と、電圧変換部およびスイッチ部を制御する電圧検出部とを備える。この電圧検出部は、電池電圧を所定の基準電圧と比較し、電池電圧が前記基準電圧より高いとき前記電圧変換部を動作状態とするとともに前記スイッチ部を非導通状態とし、電池電圧が前記基準電圧以下となったとき前記電圧変換部を非動作状態とするとともに前記スイッチ部を導通状態とする。   A first power amplifier power supply device according to the present invention is a power supply device for a power amplifier using a battery as an operation power supply, and supplies a voltage converter for stepping down a battery voltage and the battery voltage directly to the power amplifier. And a voltage detection unit for controlling the voltage conversion unit and the switch unit. The voltage detection unit compares the battery voltage with a predetermined reference voltage, and when the battery voltage is higher than the reference voltage, the voltage conversion unit is set in an operation state and the switch unit is set in a non-conduction state. When the voltage is equal to or lower than the voltage, the voltage conversion unit is set in a non-operating state and the switch unit is set in a conducting state.

すなわち、電池電圧が基準電圧より高い間は電圧変換部により降圧した電圧を出力し、基準電圧より低くなったときには電池電圧を直接利用する。電池電圧を直接利用する際には電圧変換部は非動作状態とするので、電圧変換部による無駄な電力は消費されない。   That is, while the battery voltage is higher than the reference voltage, a voltage stepped down by the voltage conversion unit is output, and when the battery voltage becomes lower than the reference voltage, the battery voltage is directly used. When the battery voltage is directly used, the voltage conversion unit is in a non-operating state, so that useless power by the voltage conversion unit is not consumed.

本発明による第２の電力増幅器用電源装置は、電池を動作電源とする電力増幅器のための電源装置であって、電池電圧を昇圧する電圧変換部と、電池電圧を前記電力増幅器へ直接供給するためのスイッチ部と、電圧変換部およびスイッチ部を制御する電圧検出部とを備える。この電圧検出部は、電池電圧を所定の基準電圧と比較し、電池電圧が前記基準電圧より高いとき前記電圧変換部を非動作状態とするとともに前記スイッチ部を導通状態とし、電池電圧が前記基準電圧以下となったとき前記電圧変換部を動作状態とするとともに前記スイッチ部を非導通状態とする。   A second power amplifier power supply device according to the present invention is a power supply device for a power amplifier using a battery as an operating power supply, and includes a voltage converter for boosting a battery voltage and directly supplying the battery voltage to the power amplifier. And a voltage detection unit for controlling the voltage conversion unit and the switch unit. The voltage detection unit compares the battery voltage with a predetermined reference voltage, and when the battery voltage is higher than the reference voltage, the voltage conversion unit is set in a non-operating state and the switch unit is set in a conducting state. When the voltage is equal to or lower than the voltage, the voltage conversion unit is set in an operating state and the switch unit is set in a non-conductive state.

すなわち、電池電圧が基準電圧より高い間は電池電圧を直接利用し、基準電圧より低くなったときには電圧変換部により昇圧した電圧を出力する。電池電圧を直接利用する際には電圧変換部は非動作状態とするので、電圧変換部による無駄な電力は消費されない。   That is, while the battery voltage is higher than the reference voltage, the battery voltage is directly used, and when the battery voltage becomes lower than the reference voltage, the voltage boosted by the voltage converter is output. When the battery voltage is directly used, the voltage conversion unit is in a non-operating state, so that useless power by the voltage conversion unit is not consumed.

第１および第２の電力増幅器用電源装置は、電力増幅器に必要とする電源電圧にあわせて使い分けることができる。   The power supply devices for the first and second power amplifiers can be used properly according to the power supply voltage required for the power amplifier.

本発明の電力増幅器用電源装置は、電池電圧を検出し、その検出結果に応じて、電池電圧を直接的に使用するかまたは電圧変換部により降圧もしくは昇圧した電圧を用いるかを切り替えるとともに、電池電圧を直接使用する際には電圧変換部を非動作状態とすることにより、電力消費を必要最小限に低減し電池の効率的な電力使用を実現することができる。その結果、低電圧大寿命電池を支障なく使用可能とするとともに、その使用可能時間を延ばすことができる。   The power amplifier power supply device of the present invention detects a battery voltage, and switches between using the battery voltage directly or using a voltage stepped down or boosted by a voltage converter according to the detection result, When the voltage is used directly, the voltage converter is deactivated, so that the power consumption can be reduced to the minimum necessary and the battery can be used efficiently. As a result, the low-voltage, long-life battery can be used without any trouble, and the usable time can be extended.

以下、図面を参照しながら、本発明の実施の形態について詳細に説明する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

図１は、本発明の実施の形態に係る電力増幅器用電源装置の構成を示すブロック図である。図１において、電力増幅器用電源装置は、スイッチ部１２と、電圧検出部１３と、電圧変換部１４により構成される。スイッチ部１２は図の例ではＦＥＴにより構成されている。ＦＥＴのソース端子は電池１１に接続され、ドレイン端子は電力増幅器１５に接続される。電池１１はスイッチ部１２を介して電力増幅器（ＰＡ）１５に電源電圧Ｖｐａを供給する。スイッチ部１２のオンオフは電圧検出部１３の制御信号ｃｔｌにより制御される。すなわち、ＦＥＴのゲート端子に制御信号ｃｔｌが接続される。電圧検出部１３は電池１１の電圧Ｖｄｄを受けて、この電圧を所定の基準電圧と比較し、比較結果に基づいて制御信号ｃｔｌを生成する。また、電圧変換部１４は電池１１の電圧Ｖｄｄを降圧または昇圧する。電圧変換部１４の出力端はスイッチ部１２の出力端と接続され、スイッチ部１２と選択的に電力増幅器１５へ電源電圧Ｖｐａを供給する。電力増幅器１５はその入力信号を電力増幅した出力ＲＦ_outを生成する。   FIG. 1 is a block diagram showing a configuration of a power amplifier power supply device according to an embodiment of the present invention. In FIG. 1, the power amplifier power supply device includes a switch unit 12, a voltage detection unit 13, and a voltage conversion unit 14. In the example shown in the figure, the switch unit 12 is composed of an FET. The FET has a source terminal connected to the battery 11 and a drain terminal connected to the power amplifier 15. The battery 11 supplies the power supply voltage Vpa to the power amplifier (PA) 15 via the switch unit 12. On / off of the switch unit 12 is controlled by a control signal ctl of the voltage detection unit 13. That is, the control signal ctl is connected to the gate terminal of the FET. The voltage detector 13 receives the voltage Vdd of the battery 11, compares this voltage with a predetermined reference voltage, and generates a control signal ctl based on the comparison result. The voltage conversion unit 14 steps down or boosts the voltage Vdd of the battery 11. The output terminal of the voltage conversion unit 14 is connected to the output terminal of the switch unit 12, and supplies the power supply voltage Vpa to the power amplifier 15 selectively with the switch unit 12. The power amplifier 15 generates an output RF_out obtained by power amplification of the input signal.

図３に、電圧検出部１３として互いに逆極性の制御信号ｃｔｌを生成する電圧検出部１３ａ，１３ｂの構成例を示す。   FIG. 3 shows a configuration example of the voltage detectors 13 a and 13 b that generate the control signals ctl having opposite polarities as the voltage detector 13.

図３（ａ）の電圧検出部１３ａは、電池の電圧Ｖｄｄを分圧する分圧抵抗１３１，１３２と、電圧Ｖｄｄから基準電圧を生成するレギュレータ１３４ａと、分圧抵抗１３１，１３２からなる分圧器の出力電圧をレギュレータ１３４ａの基準電圧と比較する比較器（オペアンプ）１３３とを備える。比較器１３３は、その出力する制御信号ｃｔｌとして、分圧器の出力電圧が基準電圧より高い間は高レベルを出力し、分圧器の出力電圧が基準電圧より低くなったら低レベルを出力する。   3A includes a voltage dividing resistor 131 and 132 that divides the battery voltage Vdd, a regulator 134a that generates a reference voltage from the voltage Vdd, and a voltage dividing resistor 131 and 132. And a comparator (op-amp) 133 that compares the output voltage with the reference voltage of the regulator 134a. As the control signal ctl output, the comparator 133 outputs a high level while the output voltage of the voltage divider is higher than the reference voltage, and outputs a low level when the output voltage of the voltage divider becomes lower than the reference voltage.

図３（ｂ）の電圧検出部１３ｂは、電池の電圧Ｖｄｄを分圧する分圧抵抗１３１，１３２と、電圧Ｖｄｄから基準電圧を生成するレギュレータ１３４ｂと、分圧抵抗１３１，１３２からなる分圧器の出力電圧をレギュレータ１３４ｂの基準電圧と比較する比較器（オペアンプ）１３３とを備える。比較器１３３は、その出力する制御信号ｃｔｌとして、分圧器の出力電圧が基準電圧より高い間は低レベルを出力し、分圧器の出力電圧が基準電圧より低くなったら高レベルを出力する。   3B includes a voltage dividing resistor 131 and 132 that divides the battery voltage Vdd, a regulator 134b that generates a reference voltage from the voltage Vdd, and a voltage dividing resistor 131 and 132. And a comparator (op-amp) 133 that compares the output voltage with the reference voltage of the regulator 134b. The comparator 133 outputs a low level as the control signal ctl that is output while the output voltage of the voltage divider is higher than the reference voltage, and outputs a high level when the output voltage of the voltage divider becomes lower than the reference voltage.

図４（ａ）（ｂ）に、それぞれ電圧変換部１４の降圧型と昇圧型の具体的な回路構成例を示す。但し、これらは例示であり、本発明はこれらの具体的な回路構成に限定されるものではない。   4A and 4B show specific circuit configuration examples of the step-down type and the step-up type of the voltage conversion unit 14, respectively. However, these are merely examples, and the present invention is not limited to these specific circuit configurations.

図４（ａ）の降圧型の電圧変換部１４は、電源電圧Ｖｄｄとグランドとの間にＰＭＯＳＦＥＴ１４２とＮＭＯＳＦＥＴ１４３とを直列に接続したＣＭＯＳ回路と、このＣＭＯＳ回路のスイッチングを制御信号ｃｔｌに従って制御するＤＤ（DC-DC）制御回路１４１と、ＣＭＯＳ回路のスイッチング出力を平滑するインダクタ１４６および平滑コンデンサ１４７からなる平滑回路とにより構成される。インダクタ１４６と平滑コンデンサ１４７の接続点が出力端子１４５となる。   The step-down voltage converter 14 in FIG. 4A includes a CMOS circuit in which a PMOSFET 142 and an NMOSFET 143 are connected in series between a power supply voltage Vdd and the ground, and a DD that controls switching of the CMOS circuit according to a control signal ctl. The (DC-DC) control circuit 141 and a smoothing circuit including an inductor 146 and a smoothing capacitor 147 that smooth the switching output of the CMOS circuit are configured. A connection point between the inductor 146 and the smoothing capacitor 147 is an output terminal 145.

ＤＤ制御回路１４１は、発振器を内蔵しており、制御信号ｃｔｌが高レベルのとき、ＣＭＯＳ回路を所定の周波数でスイッチングする。すなわち、ＰＭＯＳＦＥＴ１４２とＮＭＯＳＦＥＴ１４３とを交互に導通させる。これにより、インダクタ１４６は電圧Ｖｄｄとグランドに交互に接続され、電圧Ｖｄｄが降圧され平滑化された所定の直流電圧が出力端１４５から出力される。   The DD control circuit 141 incorporates an oscillator, and switches the CMOS circuit at a predetermined frequency when the control signal ctl is at a high level. That is, the PMOSFET 142 and the NMOSFET 143 are turned on alternately. Thereby, the inductor 146 is alternately connected to the voltage Vdd and the ground, and a predetermined DC voltage obtained by stepping down and smoothing the voltage Vdd is output from the output terminal 145.

他方、制御信号ｃｔｌが低レベルのとき、ＤＤ制御回路１４１は、ＰＭＯＳＦＥＴ１４２とＮＭＯＳＦＥＴ１４３の両ゲート電圧を深くバイアスして両者共に非導通状態とする。このとき、ＤＤ制御回路１４１も上記バイアス電圧を維持したまま停止するので、消費電力を最低限に抑えることができる。   On the other hand, when the control signal ctl is at a low level, the DD control circuit 141 deeply biases both the gate voltages of the PMOSFET 142 and the NMOSFET 143 to make them non-conductive. At this time, the DD control circuit 141 is also stopped while maintaining the bias voltage, so that power consumption can be minimized.

図４（ｂ）の昇圧型の電圧変換部１４は、一端が電源電圧Ｖｄｄに接続されたインダクタ１５４と、この他端にチャネルの一端が接続され他端が接地されたＮＭＯＳＦＥＴ１５２と、インダクタ１５４の他端にチャネルの一端が接続され他端が出力端１５６に接続されたＰＭＯＳＦＥＴ１５３と、出力端１５６とグランドとの間に接続された平滑コンデンサ１５５と、制御信号ｃｔｌに従って両ＭＯＳＦＥＴをスイッチング制御するＤＤ制御回路１５１とにより構成される。   4B includes an inductor 154 having one end connected to the power supply voltage Vdd, an NMOSFET 152 having one end connected to the other end and the other end grounded, and an inductor 154. A PMOSFET 153 having one end of the channel connected to the other end and the other end connected to the output end 156, a smoothing capacitor 155 connected between the output end 156 and the ground, and a switching control of both MOSFETs according to the control signal ctl And a control circuit 151.

ＤＤ制御回路１５１は、発振器を内蔵しており、制御信号ｃｔｌが高レベルのとき、ＣＭＯＳ回路を所定の周波数でスイッチングする。すなわち、ＰＭＯＳＦＥＴ１５２とＮＭＯＳＦＥＴ１５３とを交互に導通させる。スイッチングによりインダクタ１５４に発生する逆起電力を利用してＶｄｄより高い電圧を発生させ平滑コンデンサ１５５にて出力電圧を平滑化させる。   The DD control circuit 151 includes an oscillator, and switches the CMOS circuit at a predetermined frequency when the control signal ctl is at a high level. That is, the PMOSFET 152 and the NMOSFET 153 are alternately conducted. A voltage higher than Vdd is generated using the back electromotive force generated in the inductor 154 by switching, and the output voltage is smoothed by the smoothing capacitor 155.

他方、制御信号ｃｔｌが低レベルのとき、ＤＤ制御回路１５１は、ＰＭＯＳＦＥＴ１５２とＮＭＯＳＦＥＴ１５３の両ゲート電圧を深くバイアスして両者共に非導通状態とする。このとき、ＤＤ制御回路１５１も上記バイアス電圧を維持したまま停止するので、消費電力を最低限に抑えることができる。   On the other hand, when the control signal ctl is at a low level, the DD control circuit 151 deeply biases both the gate voltages of the PMOSFET 152 and the NMOSFET 153 to make them non-conductive. At this time, the DD control circuit 151 is also stopped while maintaining the bias voltage, so that power consumption can be minimized.

次に、図５（ａ）（ｂ）により、それぞれ降圧型と昇圧型の電源装置の動作を説明する。   Next, the operation of the step-down and step-up power supply devices will be described with reference to FIGS.

図５（ａ）の降圧型では、電池がフル充電された当初はスイッチ部１２を非導通（カットオフ）状態として降圧された電圧を電力増幅器の電源電圧Ｖｐａとして用いる。降圧型変圧変換部Ｖｃｎｖの出力電圧は当該降圧された電圧（ここでは２．７Ｖ）に設定されているものとする。その後、電池電圧が所定のレベル（ここでは２．９ボルト）まで低下した時点Ｔ２で、スイッチ部１２を導通状態として電池電圧をそのまま利用し、ＤＣ−ＤＣコンバータ１４１は非動作状態とする。   In the step-down type of FIG. 5A, when the battery is fully charged, the voltage that is stepped down with the switch unit 12 in a non-conduction (cut-off) state is used as the power supply voltage Vpa of the power amplifier. It is assumed that the output voltage of the step-down transformer converter Vcnv is set to the stepped-down voltage (here, 2.7 V). Thereafter, at a time T2 when the battery voltage is lowered to a predetermined level (here, 2.9 volts), the switch unit 12 is turned on and the battery voltage is used as it is, and the DC-DC converter 141 is brought into a non-operating state.

他方、図５（ｂ）の昇圧型では、電池がフル充電された当初はスイッチ部１２を導通状態として電池電圧をそのまま利用し、ＤＣ−ＤＣコンバータ１４１は非動作状態とする。その後、電池電圧が所定のレベル（ここでは３．１ボルト）まで低下した時点Ｔ１で、スイッチ部１２を非道通状態とするとともに、ＤＣ−ＤＣコンバータ１４１を動作状態とし昇圧された電圧（ここでは３．１Ｖ）を電力増幅器１５の電源電圧Ｖｐａとして用いる。電力増幅器１５は、昇圧型の場合には３．５Ｖ程度で動作できるものとする。   On the other hand, in the step-up type shown in FIG. 5B, when the battery is fully charged, the switch unit 12 is made conductive to use the battery voltage as it is, and the DC-DC converter 141 is set to a non-operating state. Thereafter, at time T1 when the battery voltage drops to a predetermined level (here, 3.1 volts), the switch unit 12 is turned off, and the DC-DC converter 141 is turned on to increase the voltage (here). 3.1V) is used as the power supply voltage Vpa of the power amplifier 15. It is assumed that the power amplifier 15 can operate at about 3.5 V in the case of the boost type.

上述した降圧型または昇圧型の電圧変換部は、使用する電力増幅器にあわせて使い分けるこができる。   The above-described step-down type or step-up type voltage converter can be selectively used according to the power amplifier to be used.

以上、本発明の好適な実施の形態について説明したが、上記で言及した以外にも種々の変形、変更を行うことができる。例えば、スイッチ部１２はＦＥＴにより構成したが、リレーを用いて構成することも可能である。   The preferred embodiment of the present invention has been described above, but various modifications and changes other than those mentioned above can be made. For example, although the switch unit 12 is configured by an FET, it can also be configured by using a relay.

本発明の実施の形態に係る電力増幅器用電源装置の構成を示すブロック図である。It is a block diagram which shows the structure of the power supply device for power amplifiers which concerns on embodiment of this invention. 従来の炭素電極系リチウムイオン電池と合金電極系リチウムイオン電池の特性の違いを示すグラフである。It is a graph which shows the difference in the characteristic of the conventional carbon electrode type lithium ion battery and an alloy electrode type lithium ion battery. 図１内に示した電圧検出部として互いに逆極性の制御信号ｃｔｌを生成する電圧検出部１３ａ，１３ｂの構成例を示す回路図である。FIG. 3 is a circuit diagram illustrating a configuration example of voltage detection units 13a and 13b that generate control signals ctl having opposite polarities as the voltage detection unit illustrated in FIG. 1; 図１内に示した電圧変換部の構成例を示す回路図である。It is a circuit diagram which shows the structural example of the voltage conversion part shown in FIG. 本発明の実施の形態における降圧型と昇圧型の電源装置の動作の説明図である。It is explanatory drawing of operation | movement of the pressure | voltage fall type | mold and pressure | voltage rise type power supply device in embodiment of this invention.

符号の説明Explanation of symbols

１１…電池、１２…スイッチ部、１３，１３ａ，１３ｂ…電圧検出部、１４…電圧変換部、１５…電力増幅器、１３１，１３２…分圧抵抗、１３３…比較器、１３４ａ，１３４ｂ…レギュレータ DESCRIPTION OF SYMBOLS 11 ... Battery, 12 ... Switch part, 13, 13a, 13b ... Voltage detection part, 14 ... Voltage conversion part, 15 ... Power amplifier, 131, 132 ... Voltage dividing resistor, 133 ... Comparator, 134a, 134b ... Regulator

Claims (2)

電池を動作電源とする電力増幅器のための電源装置であって、
電池電圧を降圧する電圧変換部と、
電池電圧を前記電力増幅器へ直接供給するためのスイッチ部と、
電池電圧を所定の基準電圧と比較し、電池電圧が前記基準電圧より高いとき前記電圧変換部を動作状態とするとともに前記スイッチ部を非導通状態とし、電池電圧が前記基準電圧以下となったとき前記電圧変換部を非動作状態とするとともに前記スイッチ部を導通状態とする電圧検出部と
を備えたことを特徴とする電力増幅器用電源装置。 A power supply device for a power amplifier using a battery as an operating power supply,
A voltage converter for stepping down the battery voltage;
A switch unit for supplying battery voltage directly to the power amplifier;
When the battery voltage is compared with a predetermined reference voltage, and when the battery voltage is higher than the reference voltage, the voltage conversion unit is set in an operating state and the switch unit is set in a non-conductive state, and the battery voltage is equal to or lower than the reference voltage. A power detection power supply apparatus comprising: a voltage detection unit that sets the voltage conversion unit in a non-operating state and sets the switch unit in a conductive state. 電池を動作電源とする電力増幅器のための電源装置であって、
電池電圧を昇圧する電圧変換部と、
電池電圧を前記電力増幅器へ直接供給するためのスイッチ部と、
電池電圧を所定の基準電圧と比較し、電池電圧が前記基準電圧より高いとき前記電圧変換部を非動作状態とするとともに前記スイッチ部を導通状態とし、電池電圧が前記基準電圧以下となったとき前記電圧変換部を動作状態とするとともに前記スイッチ部を非導通状態とする電圧検出部と
を備えたことを特徴とする電力増幅器用電源装置。 A power supply device for a power amplifier using a battery as an operation power supply,
A voltage converter for boosting the battery voltage;
A switch for directly supplying battery voltage to the power amplifier;
When the battery voltage is compared with a predetermined reference voltage, and when the battery voltage is higher than the reference voltage, the voltage conversion unit is set to a non-operating state and the switch unit is turned on, and the battery voltage is equal to or lower than the reference voltage. A power detection power supply device comprising: a voltage detection unit that sets the voltage conversion unit to an operating state and sets the switch unit to a non-conductive state.
JP2005085630A 2005-03-24 2005-03-24 Power supply device for power amplifier Pending JP2006271112A (en)

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JP2005085630A JP2006271112A (en) 2005-03-24 2005-03-24 Power supply device for power amplifier

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009100623A (en) * 2007-10-19 2009-05-07 Oki Electric Ind Co Ltd Power supply circuit
CN103378616A (en) * 2012-04-18 2013-10-30 启攀微电子（上海）有限公司 Lithium battery power supply management circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009100623A (en) * 2007-10-19 2009-05-07 Oki Electric Ind Co Ltd Power supply circuit
CN103378616A (en) * 2012-04-18 2013-10-30 启攀微电子（上海）有限公司 Lithium battery power supply management circuit

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