JP2560628B2 - SHF converter - Google Patents
SHF converterInfo
- Publication number
- JP2560628B2 JP2560628B2 JP5300170A JP30017093A JP2560628B2 JP 2560628 B2 JP2560628 B2 JP 2560628B2 JP 5300170 A JP5300170 A JP 5300170A JP 30017093 A JP30017093 A JP 30017093A JP 2560628 B2 JP2560628 B2 JP 2560628B2
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- stabilizing
- low noise
- circuit
- output
- 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.)
- Expired - Fee Related
Links
Landscapes
- Superheterodyne Receivers (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Amplifiers (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ＳＨＦコンバータに関
し、特にＢＳやＣＳ等の衛星放送を受信するのに適した
ＳＨＦコンバータに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an SHF converter, and more particularly to an SHF converter suitable for receiving satellite broadcasting such as BS and CS.
【０００２】[0002]
【従来の技術】従来このＳＨＦコンバータは、図２に示
すように低雑音増幅回路１と、イメージ周波数を阻止す
るための帯域通過ろ波器２と、低雑音増幅回路１から出
力され帯域通過ろ波器２を通過した信号を周波数変換し
中間周波信号を生成する周波数変換器３と、この周波数
変換器３に入力する局部発振信号を生成する局部発振回
路５と、周波数変換器３から出力される中間周波信号を
増幅する中間周波増幅回路４と、外部から供給される直
流電源を受けその直流電源の電圧を安定化する電源安定
化ＩＣ６と、低雑音増幅回路１、中間周波増幅回路４及
び局部発振回路５に用いる各種バイアス電圧を電源安定
化ＩＣ６の出力から生成するバイアス回路１０と、バイ
アスライン２１と、コンデンサ２２，２４と、出力端子
２３とを有している。低雑音増幅回路１は、周囲温度が
上昇すると雑音指数が劣化するから、電源安定化ＩＣ６
は、この電源安定化ＩＣ６自ら発生する熱が前記低雑音
増幅回路１に伝達し難い位置に配置されるのが普通であ
る。2. Description of the Related Art Conventionally, this SHF converter has a low noise amplifying circuit 1, a band pass filter 2 for blocking an image frequency, and a band pass filter output from the low noise amplifying circuit 1 as shown in FIG. The frequency converter 3 that frequency-converts the signal that has passed through the wave filter 2 to generate an intermediate frequency signal, the local oscillator circuit 5 that generates a local oscillation signal to be input to the frequency converter 3, and the frequency converter 3 outputs the signal. An intermediate frequency amplifier circuit 4 for amplifying an intermediate frequency signal, a power source stabilization IC 6 for receiving a DC power source supplied from the outside and stabilizing the voltage of the DC power source, a low noise amplifier circuit 1, an intermediate frequency amplifier circuit 4, and It has a bias circuit 10 for generating various bias voltages used in the local oscillation circuit 5 from the output of the power supply stabilizing IC 6, a bias line 21, capacitors 22, 24, and an output terminal 23. . The noise figure of the low noise amplifier circuit 1 deteriorates when the ambient temperature rises.
The power stabilizing IC 6 is usually arranged at a position where it is difficult for the heat generated by itself to be transferred to the low noise amplifying circuit 1.
【０００３】ＳＨＦコンバータは、通常屋外に設置され
るから、その動作温度範囲は−３０℃〜＋５０℃という
広範囲にわたる。低雑音増幅回路１は０℃程度またはそ
れ以下の低温において雑音指数や利得において優れた性
能を示すから、単にそれらの性能の向上だけのためであ
れば、特開昭５８−１９１５１０に示されるように冷却
器で雰囲気温度を下げればよい。Since the SHF converter is usually installed outdoors, its operating temperature range extends from -30 ° C to + 50 ° C. The low-noise amplifier circuit 1 exhibits excellent performances in noise figure and gain at low temperatures of about 0 ° C. or lower, so if it is merely to improve those performances, as disclosed in Japanese Patent Laid-Open No. 58-191510. The ambient temperature may be lowered with a cooler.
【０００４】[0004]
【発明が解決しようとする課題】ところが、冷却器で低
雑音増幅回路１の雰囲気温度を下げようとすると装置が
大型化し、高価になる。そこで、一般には従来から冷却
器を備えるＳＨＦコンバータは普及していない。このよ
うな格別な温度制御装置を備えないＳＨＦコンバータに
おいては、低雑音増幅回路が周囲温度の低下につれてそ
の利得を上昇させるという傾向を一般的に持つから、動
作温度範囲が上述の如くに広い場合には、温度の低下と
共に、低雑音増幅回路は発振しやすくなり、不安定にな
る。低雑音増幅回路の作動の不安定性を回避する対策と
して、低雑音増幅回路の近傍に電波吸収体を貼付する等
の発振防止手段が必要となり、また製造工程においては
温度試験による動作安定性の確認工程が必要となる等の
欠点があった。このように従来のＳＨＦコンバータには
低雑音増幅回路の発振防止に関して解決すべき課題があ
った。However, if the ambient temperature of the low noise amplifier circuit 1 is lowered by the cooler, the size of the apparatus becomes large and the cost becomes high. Therefore, generally, the SHF converter including the cooler has not been widely used. In an SHF converter that does not include such a special temperature control device, the low noise amplifier circuit generally has a tendency to increase its gain as the ambient temperature decreases, so that when the operating temperature range is wide as described above. In addition, as the temperature decreases, the low noise amplifier circuit easily oscillates and becomes unstable. As a measure to avoid instability in the operation of the low-noise amplifier circuit, it is necessary to use an oscillation prevention means such as attaching an electromagnetic wave absorber near the low-noise amplifier circuit. Also, in the manufacturing process, check the operation stability by temperature test. There was a defect that a process was required. As described above, the conventional SHF converter has a problem to be solved regarding prevention of oscillation of the low noise amplifier circuit.
【０００５】[0005]
【課題を解決するための手段】前述の課題を解決するた
めに本発明が提供する手段は、ＢＳ，ＣＳ等の衛星放送
の受信アンテナから受けた信号を増幅する低雑音増幅回
路と、外部から供給される直流電源を受け該直流電源の
電圧を安定化する電源安定化ＩＣとを備えたＳＨＦコン
バータにおいて、前記低雑音増幅回路の近傍に配置さ
れ、周囲雰囲気の温度を検出する温度検出部と、自ら発
生する熱が前記低雑音増幅回路に効率よく伝達される位
置に配置された第１の電源安定化ＩＣと、自ら発生する
熱が前記低雑音増幅回路に伝わり難い位置に配置された
第２の電源安定化ＩＣと、前記第１の電源安定化ＩＣと
前記第２の電源安定化ＩＣとのいずれか一方に前記温度
検出部の出力に連動して前記直流電源を切換えて接続す
るスイッチ手段と、前記第１の電源安定化ＩＣの出力及
び第２の電源安定化ＩＣの出力への電流の逆流を防止す
るダイオード回路とを有し、このダイオード回路の出力
を前記低雑音増幅回路用のバイアス回路等に電源として
供給することを特徴とするＳＨＦコンバータである。Means provided by the present invention for solving the above-mentioned problems are a low noise amplifier circuit for amplifying a signal received from a receiving antenna of satellite broadcasting such as BS and CS, and an external circuit. In a SHF converter including a power supply stabilization IC that receives a supplied DC power supply and stabilizes the voltage of the DC power supply, a temperature detection unit that is arranged in the vicinity of the low noise amplification circuit and that detects the temperature of the ambient atmosphere. A first power source stabilizing IC arranged at a position where heat generated by itself is efficiently transmitted to the low noise amplification circuit; and a first power supply stabilization IC arranged at a position where heat generated by itself is difficult to be transmitted to the low noise amplification circuit. A switch for switching and connecting the DC power supply to either one of the power supply stabilization IC 2 and the first power supply stabilization IC or the second power supply stabilization IC in conjunction with the output of the temperature detection unit. Means and A diode circuit for preventing reverse current flow to the output of the first power supply stabilizing IC and the output of the second power supply stabilizing IC, and the output of this diode circuit is a bias circuit for the low noise amplifier circuit. It is an SHF converter characterized in that it is supplied as a power source to the above.
【０００６】[0006]
【実施例】次に本発明を図面を参照して説明する。図１
は本発明の一実施例のＳＨＦコンバータのブロック図で
ある。この実施例のＳＨＦコンバータは、受信アンテナ
２０で受信した１２ＧＨｚの高周波信号を増幅する低雑
音増幅回路１と、イメージ周波数を阻止するための帯域
通過ろ波器２と、低雑音増幅回路１から出力され帯域通
過ろ波器２を通過した信号を周波数変換し中間周波信号
を生成する周波数変換器３と、この周波数変換器３に入
力する局部発振信号を生成する局部発振回路５と、周波
数変換器３から出力される中間周波信号を増幅する中間
周波増幅回路４と、外部から供給される直流電源を受け
その直流電源の電圧を安定化する電源安定化ＩＣ６ａ，
６ｂと、低雑音増幅回路１、中間周波増幅回路４及び局
部発振回路５に用いる各種バイアス電圧を生成するバイ
アス回路１０と、バイアスライン２１と、コンデンサ２
２，２４と、出力端子２３と、温度検出部７と、スイッ
チ制御部８と、スイッチ９と、ダイオード１１ａ，１１
ｂとを備えてなる。図２の従来のＳＨＦコンバータと同
じ符号で示す回路要素は図２におけるものと同じ構成で
ある。The present invention will be described below with reference to the drawings. FIG.
FIG. 3 is a block diagram of an SHF converter according to an embodiment of the present invention. The SHF converter of this embodiment outputs from the low noise amplifying circuit 1 for amplifying a high frequency signal of 12 GHz received by the receiving antenna 20, a band pass filter 2 for blocking an image frequency, and the low noise amplifying circuit 1. A frequency converter 3 that frequency-converts the signal that has passed through the band-pass filter 2 to generate an intermediate frequency signal, a local oscillator circuit 5 that generates a local oscillation signal to be input to the frequency converter 3, and a frequency converter An intermediate frequency amplifier circuit 4 for amplifying an intermediate frequency signal output from the power source 3, and a power source stabilizing IC 6a for receiving a DC power source supplied from the outside and stabilizing the voltage of the DC power source,
6b, a low noise amplifier circuit 1, a bias circuit 10 for generating various bias voltages used for the intermediate frequency amplifier circuit 4 and the local oscillator circuit 5, a bias line 21, and a capacitor 2.
2, 24, the output terminal 23, the temperature detector 7, the switch controller 8, the switch 9, and the diodes 11a and 11a.
and b. Circuit elements denoted by the same reference numerals as those of the conventional SHF converter of FIG. 2 have the same configuration as that of FIG.
【０００７】この実施例は１２ＧＨｚ帯ＳＨＦコンバー
タであり、局部発振回路５は１１ＧＨｚ帯の局部発振信
号を生成し、帯域通過ろ波器２はイメージ周波数９．５
ＧＨｚを阻止する。周波数変換器３は、受信信号と局部
発振信号とを混合して、１ＧＨｚの中間周波信号を生成
する。中間周波増幅回路４は３５ｄｂの利得を有する。
コンデンサ２２は直流阻止コンデンサであり、出力端子
２３から中間周波信号が同軸ケーブルを経由してチュー
ナーへ送られる。出力端子２３へは、中間周波信号兼用
の同軸ケーブルを介してチューナーから１５Ｖの直流電
源が供給される。バイアスライン２１は、マイクロスト
リップラインでなる誘導性線路であり、１ＧＨｚの中間
周波信号を阻止し、直流電源だけを通す。コンデンサ２
４は高周波接地用である。スイッチ９の入力端には１５
ＶＤＣの電源が端子２３から常時供給されている。This embodiment is a 12 GHz band SHF converter, the local oscillation circuit 5 generates a local oscillation signal in the 11 GHz band, and the band pass filter 2 has an image frequency of 9.5.
Block GHz. The frequency converter 3 mixes the received signal and the local oscillation signal to generate an intermediate frequency signal of 1 GHz. The intermediate frequency amplifier circuit 4 has a gain of 35 db.
The capacitor 22 is a DC blocking capacitor, and the intermediate frequency signal is sent from the output terminal 23 to the tuner via the coaxial cable. The output terminal 23 is supplied with 15V DC power from the tuner via a coaxial cable that also serves as an intermediate frequency signal. The bias line 21 is an inductive line formed of a microstrip line, blocks an intermediate frequency signal of 1 GHz, and passes only a DC power source. Capacitor 2
4 is for high frequency grounding. 15 at the input end of switch 9
VDC power is constantly supplied from the terminal 23.
【０００８】この実施例は、２つの電源安定化ＩＣ６ａ
及び６ｂ、並びに温度検出部７を備えている。温度検出
部７は、低雑音増幅回路１の近傍に配置され、低雑音増
幅回路１の周囲の温度を検出する。第１の電源安定化Ｉ
Ｃ６ａは、自ら発生する熱が低雑音増幅回路１に効率よ
く伝達される位置に配置されている。第２の電源安定化
ＩＣ６ｂは、自ら発生する熱が低雑音増幅回路１に伝わ
り難い位置に配置されている。In this embodiment, two power source stabilizing ICs 6a are provided.
And 6b, and the temperature detection unit 7. The temperature detection unit 7 is arranged near the low noise amplification circuit 1 and detects the temperature around the low noise amplification circuit 1. First power source stabilization I
C6a is arranged at a position where the heat generated by itself is efficiently transferred to the low noise amplifier circuit 1. The second power supply stabilization IC 6b is arranged at a position where heat generated by itself is difficult to be transmitted to the low noise amplification circuit 1.
【０００９】スイッチ制御部８は、予め設定した閾値電
圧ＶC と温度検出部７の出力電圧ＶA とを比較する。ス
イッチ制御部８の出力電圧Ｖ0 は、ＶA ≦ＶC のときＶ
0 ＝０ＶＤＣを出力し、ＶA ＞ＶC になったときＶ0 ＝
５ＶＤＣを出力する。スイッチ９は、スイッチ制御部８
の出力電圧Ｖ0 に応じて、入力の１５ＶＤＣ電源を第１
の電源安定化ＩＣ６ａ又は第２の電源安定化ＩＣ６ｂの
いずれか一方へ接続する。The switch controller 8 compares a preset threshold voltage V C with the output voltage V A of the temperature detector 7. The output voltage V 0 of the switch control unit 8 is V when V A ≦ V C
When 0 = 0VDC is output and V A > V C , V 0 =
Output 5VDC. The switch 9 is a switch controller 8
The input 15VDC power source according to the output voltage V 0 of
The power stabilization IC 6a or the second power stabilization IC 6b is connected.
【００１０】この実施例では閾値電圧ＶC は０℃の温度
に相当する大きさに設定してある。温度検出部７の出力
電圧ＶA が０℃以下の温度に相当している期間には、ス
イッチ制御部８の出力Ｖ0 は０ＶＤＣ、スイッチ９は第
１の電源安定化ＩＣ６ａへ１５ＶＤＣを供給する。温度
検出部７の出力電圧ＶA が０℃を越える温度に相当して
いる期間にはスイッチ制御部８は５ＶＤＣを出力し、ス
イッチ９は入力の１５ＶＤＣを第２の電源安定化ＩＣ６
ｂへ接続する。ダイオード１１ａ及び１１ｂは、電源安
定化ＩＣ６ｂまたは６ａが電力を出力している期間に、
入力を受けていない（従って、出力なし）方の電源安定
化ＩＣ６ａまたは６ｂに電流がそれぞれ流入する（逆流
する）のを防ぐために設けてある。電源安定化ＩＣ６
ａ，６ｂは１５Ｖの直流電源を受けて、電圧を安定化
し、１０Ｖの安定化直流電源を生成する。In this embodiment, the threshold voltage V C is set to a value corresponding to a temperature of 0 ° C. During a period in which the output voltage V A of the temperature detector 7 corresponds to a temperature of 0 ° C. or lower, the output V 0 of the switch controller 8 is 0 VDC, and the switch 9 supplies 15 VDC to the first power stabilizing IC 6a. . During a period in which the output voltage V A of the temperature detection unit 7 corresponds to a temperature exceeding 0 ° C., the switch control unit 8 outputs 5 VDC, and the switch 9 outputs the input 15 VDC to the second power supply stabilization IC 6
Connect to b. The diodes 11a and 11b are provided during the period when the power stabilizing IC 6b or 6a is outputting power.
It is provided to prevent a current from flowing (backflowing) into the power supply stabilizing IC 6a or 6b which does not receive an input (hence no output). Power stabilization IC6
The a and 6b receive a DC power supply of 15V, stabilize the voltage, and generate a stabilized DC power supply of 10V.
【００１１】この実施例では、スイッチ制御部８に設定
された温度が０℃であり、低雑音増幅器１の雰囲気温度
が０℃以下に低下したときには、第１の電源安定化ＩＣ
６ａに通電し、第１の電源安定化ＩＣ６ａが発生する熱
で低雑音増幅回路１を加温し、低雑音増幅回路１の利得
が必要以上に上昇して発振してしまうのを防いでいる。
また、低雑音増幅回路１の雰囲気温度が０℃を越えたと
きには、低雑音増幅回路１には熱を伝達し難い位置の第
２の電源安定化ＩＣ６ｂに通電し、低雑音増幅回路１の
利得や雑音指数が電源安定化ＩＣの発熱により悪化する
のを防ぐようにしている。In this embodiment, when the temperature set in the switch controller 8 is 0 ° C. and the ambient temperature of the low noise amplifier 1 drops below 0 ° C., the first power supply stabilizing IC
6a is energized to heat the low-noise amplifier circuit 1 with heat generated by the first power supply stabilizing IC 6a, thereby preventing the low-noise amplifier circuit 1 from gaining more than necessary and oscillating. .
Further, when the ambient temperature of the low noise amplification circuit 1 exceeds 0 ° C., the second power supply stabilization IC 6b at a position where it is difficult to transfer heat to the low noise amplification circuit 1 is energized to gain the gain of the low noise amplification circuit 1. The noise figure is prevented from deteriorating due to the heat generation of the power stabilizing IC.
【００１２】なお、スイッチ制御部８の閾値電圧Ｖ
C （設定温度）、出力電圧Ｖ0 のレベル等は必要に応じ
て任意に選択することができる。The threshold voltage V of the switch controller 8
The C (set temperature), the level of the output voltage V 0 , etc. can be arbitrarily selected as required.
【００１３】[0013]
【発明の効果】以上に説明したよにに本発明は、周囲の
温度が設定温度（例えば０℃）以下の時には、第１の電
源安定化ＩＣから発生する熱により低雑音増幅回路が暖
められ、この低雑音増幅回路の利得上昇を抑えるめに、
従来低温時に問題となった発振の発生を抑えることが可
能となる。このためん従来必要とされた発振対策や温度
試験の軽減若しくは削減が可能となる為、ＳＨＦコンバ
ータのコストダウンに効果がある。As described above, according to the present invention, when the ambient temperature is equal to or lower than the set temperature (for example, 0 ° C.), the low noise amplifier circuit is warmed by the heat generated from the first power stabilizing IC. , To suppress the gain increase of this low noise amplifier circuit,
It is possible to suppress the occurrence of oscillation, which has been a problem at low temperatures in the past. For this reason, it is possible to reduce the cost of the SHF converter because it is possible to reduce or reduce the oscillation test and the temperature test that have been conventionally required.
【図１】本発明の一実施例のブロック回路図。FIG. 1 is a block circuit diagram of an embodiment of the present invention.
【図２】従来のＳＨＦコンバータのブロック回路図。FIG. 2 is a block circuit diagram of a conventional SHF converter.
１ 低雑音増幅回路 ２ 帯域通過ろ波器 ３ 周波数変換器 ４ 中間周波増幅回路 ５ 局部発振回路 ６，６ａ，６ｂ 電源安定化ＩＣ ７ 温度検出部 ８ スイッチ制御部 ９ スイッチ １０ バイアス回路 １１ａ，１１ｂ ダイオード 1 Low Noise Amplifier Circuit 2 Band Pass Filter 3 Frequency Converter 4 Intermediate Frequency Amplifier Circuit 5 Local Oscillation Circuit 6, 6a, 6b Power Supply Stabilizing IC 7 Temperature Detector 8 Switch Controller 9 Switch 10 Bias Circuit 11a, 11b Diode
Claims (2)
から受けた信号を増幅する低雑音増幅回路と、外部から
供給される直流電源を受け該直流電源の電圧を安定化す
る電源安定化ＩＣとを備えたＳＨＦコンバータにおい
て、前記低雑音増幅回路の近傍に配置され、周囲雰囲気
の温度を検出する温度検出部と、自ら発生する熱が前記
低雑音増幅回路に効率よく伝達される位置に配置された
第１の電源安定化ＩＣと、自ら発生する熱が前記低雑音
増幅回路に伝わり難い位置に配置された第２の電源安定
化ＩＣと、前記第１の電源安定化ＩＣと前記第２の電源
安定化ＩＣとのいずれか一方に前記温度検出部の出力に
連動して前記直流電源を切り換えて接続するスイッチ手
段と、前記第１の電源安定化ＩＣの出力及び第２の電源
安定化ＩＣの出力への電流の逆流を防止するダイオード
回路とを有し、このダイオード回路の出力を前記低雑音
増幅回路用のバイアス回路等に電源として供給すること
を特徴とするＳＨＦコンバータ。1. A low noise amplifier circuit for amplifying a signal received from a receiving antenna of satellite broadcasting such as BS and CS, and a power source stabilizing IC for receiving a DC power source supplied from the outside and stabilizing the voltage of the DC power source. In an SHF converter including: a temperature detection unit that is arranged in the vicinity of the low noise amplification circuit and detects the temperature of the ambient atmosphere; and a position where heat generated by itself is efficiently transmitted to the low noise amplification circuit. First power supply stabilizing IC, a second power supply stabilizing IC arranged at a position where heat generated by itself is difficult to be transmitted to the low noise amplifier circuit, the first power supply stabilizing IC and the second power supply stabilizing IC. Switch means for switching and connecting the DC power supply to either one of the power supply stabilization IC, the output of the temperature detection unit, and the output of the first power supply stabilization IC and the second power supply stabilization. To the output of the IC A SHF converter having a diode circuit for preventing reverse current flow, and supplying the output of the diode circuit to the bias circuit for the low noise amplifier circuit as a power source.
出力電圧と閾値電圧とを比較し、該出力電圧が該閾値電
圧を越えたときにデジタル出力レベルを変えるスイッチ
制御部と、前記デジタル出力レベルに応じて前記第１又
は第２の電源安定化ＩＣに前記直流電源を分配するスイ
ッチとからなることを特徴とする請求項１に記載のＳＨ
Ｆコンバータ。2. The switch control unit compares the output voltage of the temperature detection unit with a threshold voltage and changes a digital output level when the output voltage exceeds the threshold voltage, and the digital output. The SH according to claim 1, comprising a switch for distributing the DC power to the first or second power stabilizing IC according to a level.
F converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5300170A JP2560628B2 (en) | 1993-11-30 | 1993-11-30 | SHF converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5300170A JP2560628B2 (en) | 1993-11-30 | 1993-11-30 | SHF converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07154283A JPH07154283A (en) | 1995-06-16 |
| JP2560628B2 true JP2560628B2 (en) | 1996-12-04 |
Family
ID=17881592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5300170A Expired - Fee Related JP2560628B2 (en) | 1993-11-30 | 1993-11-30 | SHF converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2560628B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006203488A (en) * | 2005-01-20 | 2006-08-03 | Matsushita Electric Ind Co Ltd | High frequency signal receiver, integrated circuit used for same and electronic equipment using receiver |
-
1993
- 1993-11-30 JP JP5300170A patent/JP2560628B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07154283A (en) | 1995-06-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19960723 |
|
| LAPS | Cancellation because of no payment of annual fees |