JP2016127589A - 無線周波数入力信号の振幅調整による圧縮制御 - Google Patents
無線周波数入力信号の振幅調整による圧縮制御 Download PDFInfo
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Abstract
【解決手段】電力増幅器モジュール202を含む送受信器500は、カスコードトランジスタ対208を含む。電流比較器236は、第1トランジスタ210の第1ベース電流IRFと第2トランジスタ212の第2ベース電流ICSDとを比較する。飽和制御器240は、比較値に基づいて基準信号をRF減衰器502へと供給する。RF減衰器は、電力増幅器へ供給されたRF入力信号の振幅を、少なくとも部分的には基準信号に基づいて修正する。
【選択図】図5
Description
本願は、2014年12月30日出願の「電力増幅器の負荷調整による圧縮制御」との名称の米国仮出願第62/097,877号、2014年12月30日出願の「無線周波数入力信号の振幅調整による圧縮制御」との名称の米国仮出願第62/097,899号、2014年12月30日出願の「電力増幅器の電圧調整による圧縮制御」との名称の米国仮出願第62/097,941号の優先権を主張する。これらの開示はそれぞれの全体が、ここに明示的に参照として組み入れられる。
Claims (20)
- 電力増幅器モジュールであって、
第1トランジスタ及び第2トランジスタを含むカスコードトランジスタ対を含む電力増幅器と、
電流比較器、飽和制御器及び無線周波数(RF)減衰器を含む電力増幅器バイアス制御器と
を含み、
前記電流比較器は、前記第1トランジスタの第1ベース電流と前記第2トランジスタの第2ベース電流とを比較して比較値を得るべく構成され、
前記飽和制御器は、前記比較値に基づいて基準信号を前記RF減衰器へと供給するべく構成され、
前記RF減衰器は、前記電力増幅器へと供給されたRF入力信号の振幅を、少なくとも部分的には前記基準信号に基づいて修正するべく構成される電力増幅モジュール。 - 前記RF減衰器は、前記RF入力信号の振幅を、少なくとも部分的には減衰値に基づいて修正するべく構成されたデジタル減衰器である請求項1の電力増幅器。
- 前記減衰値は、複数の離散減衰値から選択された一の離散減衰値であり、
前記離散減衰値の選択は、少なくとも部分的には前記基準信号に基づく請求項2の電力増幅器。 - 前記RF減衰器は、前記RF入力信号の振幅を、少なくとも部分的には減衰値に基づいて修正するべく構成されたアナログ減衰器である請求項1の電力増幅器。
- 前記減衰値は、前記電力増幅器が飽和状態で動作していないことを前記基準信号が示すまでずっと連続的に修正されるアナログ電圧に基づく請求項4の電力増幅器。
- 前記アナログ減衰器は、前記アナログ電圧を、少なくとも部分的には前記アナログ減衰器の極性に基づいて、前記アナログ電圧を増加させることにより修正するか又は前記アナログ電圧を低下させることにより修正するかを決定する請求項5の電力増幅器。
- 前記第1トランジスタは共通ベーストランジスタであり、
前記第2トランジスタは共通エミッタトランジスタである請求項1の電力増幅器モジュール。 - 前記電力増幅器へと与えられる供給電圧を調節するべく構成されたブースト変換器をさらに含む請求項1の電力増幅器モジュール。
- 前記飽和制御器はさらにデジタル/アナログ変換器及びランプ波発生器を含み、
前記ランプ波発生器は、カウント値を前記デジタル/アナログ変換器へと供給するべく構成され、
前記デジタル/アナログ変換器は、少なくとも部分的には前記カウント値に基づいて前記基準信号を発生させるべく構成される請求項1の電力増幅器モジュール。 - 前記基準信号は、前記RF減衰器に対する減衰値を特定する8ビットワードであり、
前記RF減衰器は、前記RF入力信号の振幅を、少なくとも部分的には前記減衰値に基づいて修正する請求項9の電力増幅器モジュール。 - 前記飽和制御器は、
前記電力増幅器バイアス制御器と電気的に通信するプルダウン抵抗器と、
電圧入力/出力ピンと、
ランプクロック発生器と
を含み、
前記ランプクロック発生器は、前記プルダウン抵抗器の両端間の電圧であって少なくとも部分的には前記比較値に基づく電圧に基づいて、前記第1トランジスタが飽和領域で動作しているか否かを検出するべく構成され、
前記ランプクロック発生器は、前記第1トランジスタが前記飽和領域で動作しているとの検出に応答して、前記ランプ波発生器に前記カウント値を修正させるべく構成される請求項9の電力増幅器モジュール。 - 送受信器であって、
受信器と、
電力増幅器モジュールを含む送信器と
を含み、
前記電力増幅器モジュールは電力増幅器及び電力増幅器バイアス制御器を含み、
前記電力増幅器はカスコードトランジスタ対を含み、
前記カスコードトランジスタ対は第1トランジスタ及び第2トランジスタを含み、
前記電力増幅器バイアス制御器は、電流比較器、飽和制御器及び無線周波数(RF)減衰器を含み、
前記電流比較器は、前記第1トランジスタのベース電流と前記第2トランジスタのベース電流とを比較して比較値を得るべく構成され、
前記飽和制御器は、前記比較値に基づいて基準信号を前記RF減衰器へと供給するべく構成され、
前記RF減衰器は、前記電力増幅器へと供給されたRF入力信号の振幅を、少なくとも部分的には前記基準信号に基づいて修正するべく構成される送受信器。 - 前記RF減衰器は、前記RF入力信号の振幅を、少なくとも部分的には減衰値に基づいて修正するべく構成されたデジタル減衰器である請求項12の送受信器。
- 前記減衰値は、複数の離散減衰値から選択された一の離散減衰値であり、
前記離散減衰値の選択は、少なくとも部分的には前記基準信号に基づく請求項13の送受信器。 - 前記RF減衰器は、前記RF入力信号の振幅を、少なくとも部分的には減衰値に基づいて修正するべく構成されたアナログ減衰器である請求項12の送受信器。
- 前記減衰値は、前記電力増幅器が飽和状態で動作していないことを前記基準信号が示すまでずっと連続的に修正されるアナログ電圧に少なくとも部分的に基づく請求項15の送受信器。
- 前記アナログ減衰器は、前記アナログ電圧を、少なくとも部分的には前記アナログ減衰器の極性に基づいて、前記アナログ電圧を増加させることにより修正するか又は前記アナログ電圧を低下させることにより修正するかを決定する請求項16の送受信器。
- 無線デバイスであって、
送信器からの信号を少なくとも送信するべく構成されたアンテナと、
電力増幅器モジュールを含む送信器と
を含み、
前記信号は、前記送信器の電力増幅器へと供給された無線周波数入力信号に少なくとも部分的に基づき、
前記電力増幅器モジュールは前記電力増幅器及び電力増幅器バイアス制御器を含み、
前記電力増幅器はカスコードトランジスタ対を含み、
前記カスコードトランジスタ対は第1トランジスタ及び第2トランジスタを含み、
前記電力増幅器バイアス制御器は、電流比較器、飽和制御器及びRF減衰器を含み、
前記電流比較器は、前記第1トランジスタのベース電流と前記第2トランジスタのベース電流とを比較して比較値を得るべく構成され、
前記飽和制御器は、前記比較値に基づいて基準信号を前記RF減衰器へと供給するべく構成され、
前記RF減衰器は、前記電力増幅器へと供給された前記RF入力信号の振幅を、少なくとも部分的には前記基準信号に基づいて修正するべく構成される無線デバイス。 - 前記RF減衰器は、前記RF入力信号の振幅を、複数の離散減衰値から選択された一の離散減衰値に少なくとも部分的に基づいて修正するべく構成されたデジタル減衰器であり、
前記離散減衰値の選択は、少なくとも部分的には前記基準信号に基づく請求項18の無線デバイス。 - 前記RF減衰器は、前記RF入力信号の振幅を、少なくとも部分的には減衰値に基づいて修正するべく構成されたアナログ減衰器であり、
前記減衰値は、前記電力増幅器が飽和状態で動作していないことを前記基準信号が示すまでずっと連続的に修正されるアナログ電圧に少なくとも部分的に基づく請求項18の無線デバイス。
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Application Number | Priority Date | Filing Date | Title |
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US201462097899P | 2014-12-30 | 2014-12-30 | |
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