JPS62209909A - Ultra high frequency semiconductor circuit - Google Patents

Ultra high frequency semiconductor circuit

Info

Publication number
JPS62209909A
JPS62209909A JP5283686A JP5283686A JPS62209909A JP S62209909 A JPS62209909 A JP S62209909A JP 5283686 A JP5283686 A JP 5283686A JP 5283686 A JP5283686 A JP 5283686A JP S62209909 A JPS62209909 A JP S62209909A
Authority
JP
Japan
Prior art keywords
high frequency
bias circuit
ultra
circuit
frequency
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP5283686A
Other languages
Japanese (ja)
Other versions
JPH0535923B2 (en
Inventor
Kenji Ito
健治 伊東
Akio Iida
明夫 飯田
Sunao Takagi
直 高木
Makoto Matsunaga
誠 松永
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP5283686A priority Critical patent/JPS62209909A/en
Publication of JPS62209909A publication Critical patent/JPS62209909A/en
Publication of JPH0535923B2 publication Critical patent/JPH0535923B2/ja
Granted legal-status Critical Current

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  • Microwave Amplifiers (AREA)
  • Amplifiers (AREA)

Abstract

PURPOSE:To decrease an ultra high frequency electric power in the vicinity of a necessary frequency by having a sufficiently small reactance by the ultra high frequency in the vicinity of the necessary frequency at a resistance in a bias circuit and providing in parallel a capacitor having the capacity value which has a large reactance in the low frequency. CONSTITUTION:A capacity value cb of a capacitor 4b is set to have a sufficiently small reactance in the vicinity of a necessary frequency and to be a large reactance in a low frequency. When an FET 6 is an unstable action, for example, in the low frequency to facilitate to cause an oscillation, etc., an electric length l of a microstrip line 2 is sufficiently smaller than the wavelength, and therefore, by using a bias circuit 1b, in the low frequency, a resistance 3a is given as the load to the FET 6 and the unstable action of the oscillating, etc., is prevented. In the necessary frequency, the electric length l of the microstrip line 2 is a 1/4 wavelength, and therefore, the impedance when the bias circuit 1b is watched from a connecting point 10 of a bias circuit comes to be infinite. Thus, the consumption of the ultra high frequency electric power is minimized in the bias circuit 1b.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、超高周波電力の損失が少く、かつ低周波に
おけ、る半導体素子の安定動作を可能にする超高周波半
導体回路のバイアス供給回路に関するものであろう 〔従来の技術〕 ここでは、半導体素子を用いた超高周波半導体回路の1
つである電界効果トランジスタ(以下FETと略す)増
幅器を例として用い説明するっ第5図は、たとえば公開
特許公報昭57−15510に示された従来の構成のバ
イアス回路によるPET増幅器の一例であるっ第5図に
おいて、 (la)はバイアス回路、(2)はマイクロ
ストリップ線路、 (3a)は抵抗、 (4a)Hコン
デンサ、(5)はバイアス′〔4圧端子、(6)けFB
T、 +71はPETのゲート電極、(8)はF’ET
のドレイン’rg、@、  (91はFETのソース電
極、10)はバイアス回路の接読点であり、l!はマイ
クロストリップ線路(2)の電気長、Raは抵抗(3a
)の抵抗値、Caはコンデンサ(4a)の容量値を示す
っ第5図においては、  FET(51のゲート電極(
7)に対し、バイアス電圧をバイアス電圧端子(5)よ
り抵抗(3a)、 マイクロストリップ線路(2)を介
して印加する構成になっているうまた。jは所要の周波
数で4分の1波長の電気長になるように設定され、Ca
は、たとえば数1003G(z程度の低い周波数まで十
分小さなリアクタンスになるように、その容゛な値が設
定されている。
[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a bias supply circuit for an ultra-high frequency semiconductor circuit that has little loss of ultra-high frequency power and enables stable operation of a semiconductor element at low frequencies. [Conventional technology] Here, we will discuss one of the ultra-high frequency semiconductor circuits using semiconductor elements.
This will be explained using a field effect transistor (hereinafter abbreviated as FET) amplifier as an example. Fig. 5 shows an example of a PET amplifier using a bias circuit having a conventional configuration as shown in, for example, Japanese Patent Publication No. 57-15510. In Figure 5, (la) is the bias circuit, (2) is the microstrip line, (3a) is the resistor, (4a) is the H capacitor, (5) is the bias terminal (4-voltage terminal), (6) is the FB
T, +71 is the gate electrode of PET, (8) is F'ET
The drain 'rg, @, (91 is the source electrode of the FET, 10) is the contact point of the bias circuit, and l! is the electrical length of the microstrip line (2), Ra is the resistance (3a
), and Ca indicates the capacitance value of the capacitor (4a). In Fig. 5, the gate electrode (
7), the mount is configured to apply a bias voltage from the bias voltage terminal (5) via the resistor (3a) and the microstrip line (2). j is set to have an electrical length of 1/4 wavelength at the required frequency, and Ca
is set to a variable value so as to have a sufficiently small reactance down to frequencies as low as, for example, several 1003 G(z).

第5図において、 FET+61が不安定動作たとえば
発掘等を起こしやすい低周波において、マイクロストリ
ップ、線路(2)の電気長lが波長と比較して十分短い
ので、バイアス回路(1a)はwJz図に示す等価回路
で表わす事ができろう第2図のバイアス回路の接続点u
alは、第5図のバイアス回路(1a)の接続点朋に対
応しているう第5図のバイアス回路(1a)により、低
周波においては、抵抗(3a)がFET +61に対す
る負荷として与えられるので1発]辰等の不安定動作を
防止する事ができるっ 〔発明が解決しようとする問題点〕 第5図に示した従来の構成のFET増幅器のバイアス回
路(1a)は、所要の周波数近傍において、第6図に示
す等価回路で表わす事ができるう所要の周波数において
、第6図のマイクロストリップ線路(2)の電気長lは
4分の1波長であるので、第5図でのバイアス回路の接
続点qolからバイアス回路(la)をみたときのイン
ピーダンスRbは次式で与えられる。
In Figure 5, at low frequencies where FET+61 is likely to cause unstable operation, such as excavation, the electrical length l of the microstrip line (2) is sufficiently short compared to the wavelength, so the bias circuit (1a) is The connection point u of the bias circuit in Figure 2 can be expressed by the equivalent circuit shown below.
al corresponds to the connection point of the bias circuit (1a) in Fig. 5. Due to the bias circuit (1a) in Fig. 5, the resistor (3a) is applied as a load to the FET +61 at low frequencies. [Problem to be solved by the invention] The bias circuit (1a) of the conventional FET amplifier shown in FIG. In the vicinity, at the required frequency that can be expressed by the equivalent circuit shown in Fig. 6, the electrical length l of the microstrip line (2) in Fig. 6 is a quarter wavelength, so the The impedance Rb when the bias circuit (la) is viewed from the connection point qol of the bias circuit is given by the following equation.

第113弐ておいて、Zけ第5図のマイクロストリップ
線路(2)の特性インピーダンスであろう従って。
Therefore, the characteristic impedance of the microstrip line (2) in FIG.

第5図のバイアス回路(1a)を用いた場合、所要の周
波数近傍において、第11)式で与えられる抵抗がFE
T (5)に対して並列に接続されるので、所要の周波
数における超高周波電力が消費されるっこのため、利得
の低下、雑音指数の劣化等の問題点を生じるつ この発明は、これらの問題点を解消するために成された
もので、所要の周波数における超高周波電力の消費を減
少し、かつ従来の構成と同様に低い周波数での安定動作
を可能とする超高周波半導体回路を得ることを目的とす
る。
When using the bias circuit (1a) in Fig. 5, the resistance given by equation 11) is FE in the vicinity of the required frequency.
Since it is connected in parallel to T (5), ultra-high frequency power at the required frequency is consumed, resulting in problems such as a decrease in gain and deterioration of noise figure. This was accomplished in order to solve the problems, and to obtain an ultra-high frequency semiconductor circuit that reduces ultra-high frequency power consumption at a required frequency and enables stable operation at low frequencies similar to the conventional configuration. With the goal.

〔問題点を解決するだめの手段〕[Failure to solve the problem]

この発明による超高周波半導体回路は、バイアス回路中
の抵抗に、所要の周波数近傍の超高周波では十分小さな
リアクタンスを有し、かつ低周波において大きなりアク
タンスを有するような容量値をもつコンデンサを並列に
設ける様に構成したものであるっ 〔作用〕 この発明による超高周波半導体回路は、バイアス回路を
、所要の周波数で4分の1波長の電気長を有するマイク
ロストリップ線路、抵抗とコンデンサの並列回路、及び
接地されたコンデンサの直列回路で構成することにより
、所要の周波数近傍での超高周波電力の消費を減少し、
また低周波では、 PETを安定動作させる事ができろ
う〔発明の実施例〕 第1図に、この発明による超高周波半導体回路の一実権
例であるFET増幅器の回路を示すつ第1図において、
  (lb)はバイアス回路、 (4b)はコンデンサ
で、Cbはその容量値である。
In the ultra-high frequency semiconductor circuit according to the present invention, a capacitor having a capacitance value that has a sufficiently small reactance at ultra-high frequencies near a required frequency and a large reactance at low frequencies is connected in parallel to the resistor in the bias circuit. [Function] The ultra-high frequency semiconductor circuit according to the present invention is configured such that the bias circuit is a microstrip line having an electrical length of a quarter wavelength at a required frequency, a parallel circuit of a resistor and a capacitor, By configuring it with a series circuit of a grounded capacitor and a grounded capacitor, the consumption of ultra-high frequency power near the required frequency is reduced.
Furthermore, at low frequencies, the PET can operate stably. [Embodiment of the Invention] Fig. 1 shows a circuit of an FET amplifier, which is an example of an ultra-high frequency semiconductor circuit according to the present invention.
(lb) is a bias circuit, (4b) is a capacitor, and Cb is its capacitance value.

第1図においては、  FET+61のゲート電標(7
)に対し、バイアス電圧をバイアス電圧端子(5)から
抵抗(3a)、マイクロストリップ線路(2)を介して
印加する構成になっているう第1図において、lは所要
の周波数で4分の1波長の電気長になるように設定され
、Caはたとえば数1001G(z程度の低い周波数で
十分小さなリアクタンスになるように、その容量値が設
定されているう またCbの容量値は、所要の周波数近傍においては十分
小さなリアクタンスをもち、かつ低周波においては大き
なりアクタンスであるように設定されている。
In Figure 1, the gate voltage of FET+61 (7
), the bias voltage is applied from the bias voltage terminal (5) via the resistor (3a) and the microstrip line (2). The electrical length of Ca is set to be one wavelength, and the capacitance value of Ca is set to have a sufficiently small reactance at a low frequency of, for example, several 1001 G (z).The capacitance value of Cb is It is set to have a sufficiently small reactance near the frequency and a large reactance at low frequencies.

第1図において、 PET(61が不安定動作、fcと
えば発掘等を起こしやすい低周波においては、マイクロ
ストリップ線路(2)の電気長lが波長と比較して十分
短かいので、バイアス回路(1b)は、第2図に示す等
両回路で表わす事ができろう第2図のバイアス回路の接
続点朋は、第1図の1101に対応しているう第1図の
バイアス回路(lb)e用いる事により、低周波におい
て、抵抗(3a)がF’BT f61に対する負荷とし
て与えられるので9発振等の不安定動作を防止する事が
できる。
In Fig. 1, at low frequencies where PET (61) tends to operate unstablely, such as fc, excavation, etc., the electrical length l of the microstrip line (2) is sufficiently short compared to the wavelength, so the bias circuit ( 1b) can be expressed by both circuits as shown in Fig. 2.The connection point of the bias circuit in Fig. 2 corresponds to 1101 in Fig. 1. By using the resistor (3a) at low frequencies, the resistor (3a) is applied as a load to the F'BT f61, making it possible to prevent unstable operation such as oscillation.

第1図に示したこの発明によるFET増幅器のバイアス
回路(lb)fl、所要の周波数において、第3図に示
す等価回路で表わす事ができる5所要の周波数において
、第3図のマイクロストリップ線路(2)の′電気長l
は4分の1波長であるので、第1図でのバイアス回路の
接続点11αからバイアス回路(lb)をみたときのイ
ンピーダンスは無限大となる。
The bias circuit (lb) fl of the FET amplifier according to the present invention shown in FIG. 2)' electrical length l
is a quarter wavelength, so the impedance when the bias circuit (lb) is viewed from the connection point 11α of the bias circuit in FIG. 1 becomes infinite.

従って、所要の周波数近傍において、第1図のバイアス
回路(1b)における、超高周波電力の消費は。
Therefore, in the vicinity of the required frequency, the consumption of ultra-high frequency power in the bias circuit (1b) of FIG. 1 is as follows.

従来の構成による第5図のバイアス回路(1a)での消
費心力よりも少なくなる。
The energy consumption is lower than that of the bias circuit (1a) of FIG. 5 with the conventional configuration.

また上記実施例では、第1図に示したバイアス回路(x
b)に、所要の周波数で4分の1波長の長さを有するマ
イクロストリップ線路(2)を用いたが。
Furthermore, in the above embodiment, the bias circuit (x
In b), a microstrip line (2) having a length of 1/4 wavelength at the required frequency was used.

所定の長さのマイクロストリップ線路でもよいうその場
合には、Pf+要の周波数近傍で、第1図のバイアス回
路(1b)は第3図に示すような無損失の先端短絡のマ
イクロストリップ線路で表わす事ができ、整合回路の一
部として動作するので1回路の小形化が図れる利点があ
る。
In this case, a microstrip line of a predetermined length may be used, and in the vicinity of the Pf+ frequency, the bias circuit (1b) in Figure 1 can be replaced with a lossless microstrip line with short-circuited ends as shown in Figure 3. Since it operates as a part of a matching circuit, it has the advantage that one circuit can be made smaller.

また上記実施例では、第1図に示したバイアス回路(1
b)のバイアス電圧端子+51’&、抵抗(3a)とコ
ンデンサ(4b)の並列回路と、コンデンサ(4a)と
の接続点に設けたが、第4図に示すように、マイクロス
トリップ線路(2)と、抵抗(3a)とコンデンサ(4
b)の並列回路との1音読点に設けてもよく、その場合
には、バイアス回路(1c)における直流消費′I−に
力を零にできる利点がある。
Further, in the above embodiment, the bias circuit (1
The bias voltage terminal +51'& of b) was installed at the connection point between the parallel circuit of resistor (3a) and capacitor (4b) and capacitor (4a), but as shown in Figure 4, the microstrip line (2 ), resistor (3a) and capacitor (4
It may be provided at one reading point with the parallel circuit of b), and in that case, there is an advantage that the DC consumption 'I- in the bias circuit (1c) can be made zero.

また上記実施例では、ソース接地のFET増幅器を用い
て説明したが、ゲート接地、ドレイン接地でありても同
様の効果を奏する。
Further, in the above embodiment, the FET amplifier with a common source is used, but the same effect can be obtained even if the FET amplifier is with a common gate or a common drain.

また上記実施例では、 FET増幅器の場合について説
明したが、この他に発掘器、゛4相器、変調器。
Furthermore, in the above embodiments, the case of the FET amplifier was explained, but in addition to the above, it can also be used as an excavator, a 4-phase amplifier, and a modulator.

ミクサ、リミタ等の超高周波半導体回路であってもよく
、また半導体素子としてFETの他に、バイポーラトラ
ンジスタ、ダイオード等を用いても同様の効果を奏する
It may be an ultra-high frequency semiconductor circuit such as a mixer or a limiter, and the same effect can be obtained by using a bipolar transistor, a diode, etc. in addition to FET as the semiconductor element.

また上記実施例では、伝送線路として、マイクロストリ
ップ線路を用いて説明したが、トリプレート線路、同軸
線路等の伝送線路でも同様の効果を奏する事ができる。
Further, in the above embodiments, a microstrip line is used as the transmission line, but the same effect can be achieved using a transmission line such as a triplate line or a coaxial line.

〔発明の効果〕〔Effect of the invention〕

以上のように、この発明によれば、超高周波半導体回路
のバイアス回路における。所要周波数近傍での超高周波
電力の消費を従来よりも減少させる事ができるので、た
とえば増幅器の高利得化。
As described above, the present invention provides a bias circuit for an ultra-high frequency semiconductor circuit. This makes it possible to reduce the consumption of ultra-high frequency power near the required frequency compared to conventional methods, making it possible to increase the gain of amplifiers, for example.

発掘器の低雑音化等の効果が得られる。Effects such as lower noise of the excavator can be obtained.

【図面の簡単な説明】[Brief explanation of drawings]

第1図はこの発明の一実施例にょるFET増幅器の回路
、第2図はFET増幅器のバイアス回路の低周波におけ
る等価回路、第3図はこの発明にょるFET増幅器のバ
イアス回路の、所要周波数における等価回路、第4図は
この発明の他の実施例にょるFET増幅器の回路、第5
図は従来の構成にょるFET増幅器の回路、第6図は従
来の構成によるFET増幅器のバイアス回路の、所要周
波数における等価回路である。 図中、 (la)・(lb)・(lc)はバイアス回路
、(2)はマイクロストリップ線路、 (3a)は抵抗
、 (4a)・(4b)はコンデンサ、(5)はバイア
ス屈圧端子、(6)はFET。 (7)はゲー1− ’4極、(8)はドレイン電極、(
9)はソース′#M、i、側はバイアス回路の接続点で
ある。
Fig. 1 shows a circuit of an FET amplifier according to an embodiment of the present invention, Fig. 2 shows an equivalent circuit at a low frequency of a bias circuit of an FET amplifier, and Fig. 3 shows a required frequency of a bias circuit of an FET amplifier according to this invention. FIG. 4 is an equivalent circuit of an FET amplifier according to another embodiment of the present invention, and FIG.
The figure shows a circuit of an FET amplifier with a conventional configuration, and FIG. 6 shows an equivalent circuit at a required frequency of a bias circuit of an FET amplifier with a conventional configuration. In the figure, (la), (lb), and (lc) are bias circuits, (2) is a microstrip line, (3a) is a resistor, (4a) and (4b) are capacitors, and (5) is a bias voltage terminal. , (6) is an FET. (7) is the gate 1-'4 pole, (8) is the drain electrode, (
9) is the connection point of the bias circuit on the source '#M, i side.

Claims (4)

【特許請求の範囲】[Claims] (1)ダイオード、あるいはトランジスタ等の半導体素
子を有する超高周波半導体回路において、上記超高周波
半導体回路中の超高周波電力を伝送する第1の線路に、
所定の長さを有する第2の線路の一端を接続し、この第
2の線路の他の一端に抵抗と第1のコンデンサとからな
る並列回路の一端を接続し、この並列回路の他の一端を
第2のコンデンサを介して接地し、上記第2の線路の他
の一端から上記第2のコンデンサに至るまでの間からバ
イアス電圧を印加する事を特徴とする超高周波半導体回
路。
(1) In an ultra-high frequency semiconductor circuit having a semiconductor element such as a diode or a transistor, a first line for transmitting ultra-high frequency power in the ultra-high frequency semiconductor circuit,
Connect one end of a second line having a predetermined length, connect one end of a parallel circuit consisting of a resistor and a first capacitor to the other end of this second line, and connect the other end of this parallel circuit. is grounded via a second capacitor, and a bias voltage is applied from the other end of the second line to the second capacitor.
(2)第2の線路の長さは、所要の周波数の4分の1波
長の電気長である事を特徴とする特許請求の範囲第1項
記載の超高周波半導体回路。
(2) The ultra-high frequency semiconductor circuit according to claim 1, wherein the length of the second line is an electrical length of a quarter wavelength of a required frequency.
(3)バイアス電圧は並列回路と第2のコンデンサの接
続点から印加する構成としたことを特徴とする特許請求
の範囲第1項または第2項記載の超高周波半導体回路。
(3) The ultra-high frequency semiconductor circuit according to claim 1 or 2, wherein the bias voltage is applied from a connection point between the parallel circuit and the second capacitor.
(4)バイアス電圧は第2の線路と並列回路の接続点か
ら印加する構成としたことを特徴とする特許請求の範囲
第1項または第2項記載の超高周波半導体回路。
(4) The ultra-high frequency semiconductor circuit according to claim 1 or 2, wherein the bias voltage is applied from a connection point between the second line and the parallel circuit.
JP5283686A 1986-03-11 1986-03-11 Ultra high frequency semiconductor circuit Granted JPS62209909A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5283686A JPS62209909A (en) 1986-03-11 1986-03-11 Ultra high frequency semiconductor circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5283686A JPS62209909A (en) 1986-03-11 1986-03-11 Ultra high frequency semiconductor circuit

Publications (2)

Publication Number Publication Date
JPS62209909A true JPS62209909A (en) 1987-09-16
JPH0535923B2 JPH0535923B2 (en) 1993-05-27

Family

ID=12925931

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5283686A Granted JPS62209909A (en) 1986-03-11 1986-03-11 Ultra high frequency semiconductor circuit

Country Status (1)

Country Link
JP (1) JPS62209909A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0468706A (en) * 1990-07-04 1992-03-04 Mitsubishi Electric Corp Broad band fet amplifier
JP2007150419A (en) * 2005-11-24 2007-06-14 Mitsubishi Electric Corp Power amplifier
WO2014050611A1 (en) 2012-09-25 2014-04-03 三菱電機株式会社 Microwave amplifier device
CN110113015A (en) * 2019-04-29 2019-08-09 中国电子科技集团公司第十三研究所 Gate bias circuit and power amplifier

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS523362A (en) * 1975-06-26 1977-01-11 Mitsubishi Electric Corp Distribution constant type high frequency transistor circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS523362A (en) * 1975-06-26 1977-01-11 Mitsubishi Electric Corp Distribution constant type high frequency transistor circuit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0468706A (en) * 1990-07-04 1992-03-04 Mitsubishi Electric Corp Broad band fet amplifier
JP2007150419A (en) * 2005-11-24 2007-06-14 Mitsubishi Electric Corp Power amplifier
WO2014050611A1 (en) 2012-09-25 2014-04-03 三菱電機株式会社 Microwave amplifier device
US9543898B2 (en) 2012-09-25 2017-01-10 Mitsubishi Electric Corporation Microwave amplifier device
CN110113015A (en) * 2019-04-29 2019-08-09 中国电子科技集团公司第十三研究所 Gate bias circuit and power amplifier

Also Published As

Publication number Publication date
JPH0535923B2 (en) 1993-05-27

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