JPS6364139U - - Google Patents
Info
- Publication number
- JPS6364139U JPS6364139U JP1986157096U JP15709686U JPS6364139U JP S6364139 U JPS6364139 U JP S6364139U JP 1986157096 U JP1986157096 U JP 1986157096U JP 15709686 U JP15709686 U JP 15709686U JP S6364139 U JPS6364139 U JP S6364139U
- Authority
- JP
- Japan
- Prior art keywords
- collector
- frequency
- oscillation transistor
- oscillation
- local oscillator
- 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.)
- Pending
Links
- 230000010355 oscillation Effects 0.000 claims description 5
- 239000003990 capacitor Substances 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
- H03B5/1237—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator
- H03B5/124—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator the means comprising a voltage dependent capacitance
- H03B5/1243—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator the means comprising a voltage dependent capacitance the means comprising voltage variable capacitance diodes
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
- H03B5/1231—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device the amplifier comprising one or more bipolar transistors
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B2202/00—Aspects of oscillators relating to reduction of undesired oscillations
- H03B2202/02—Reduction of undesired oscillations originated from natural noise of the circuit elements of the oscillator
Landscapes
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
- Superheterodyne Receivers (AREA)
Description
図は本考案の一実施例を示す回路図である。
OSC……局部発振器、TR……発振用トラン
ジスタ、10……共振回路、LCF……ローカツ
トフイルタ。
ジスタ、10……共振回路、LCF……ローカツ
トフイルタ。
Claims (1)
- 中間周波数を生成する局部発振器の発振用のト
ランジスタのコレクタに発振周波数を決定する共
振回路との間をコンデンサによりカツプリングし
、前記共振回路および前記発振用トランジスタの
コレクタとの接続点と接地間に接続した接地抵抗
および前記コンデンサとによりカツトオフ周波数
が可聴周波数以上のローカツトフイルタを構成し
たことにより、前記局部発振器が前記発振用トラ
ンジスタのコレクタノイズで変調を受けないよう
にした局部発振回路。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1986157096U JPS6364139U (ja) | 1986-10-14 | 1986-10-14 | |
KR2019870017513U KR910001427Y1 (ko) | 1986-10-14 | 1987-10-14 | 발진 회로 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1986157096U JPS6364139U (ja) | 1986-10-14 | 1986-10-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6364139U true JPS6364139U (ja) | 1988-04-27 |
Family
ID=31079329
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1986157096U Pending JPS6364139U (ja) | 1986-10-14 | 1986-10-14 |
Country Status (2)
Country | Link |
---|---|
JP (1) | JPS6364139U (ja) |
KR (1) | KR910001427Y1 (ja) |
-
1986
- 1986-10-14 JP JP1986157096U patent/JPS6364139U/ja active Pending
-
1987
- 1987-10-14 KR KR2019870017513U patent/KR910001427Y1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR910001427Y1 (ko) | 1991-03-04 |
KR880008835U (ko) | 1988-06-30 |