JPS648704A - Oscillation circuit - Google Patents
Oscillation circuitInfo
- Publication number
- JPS648704A JPS648704A JP16418287A JP16418287A JPS648704A JP S648704 A JPS648704 A JP S648704A JP 16418287 A JP16418287 A JP 16418287A JP 16418287 A JP16418287 A JP 16418287A JP S648704 A JPS648704 A JP S648704A
- Authority
- JP
- Japan
- Prior art keywords
- capacitor
- base
- feedback loop
- positive feedback
- emitter
- 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
Links
Landscapes
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
Abstract
PURPOSE:To oscillate the titled circuit stably over a wide frequency band by connecting a base of a 1st transistor(TR), a collector of a 2nd TR and a parallel resonance circuit by 1st and 2nd capacitors of small capacitance and connecting the emitters of both TRs with a separate capacitor. CONSTITUTION:A current flowing from a base of a TR 31 to a capacitor 35 via an emitter is fed to a capacitor 28 from the emitter of a TR 32 to a capacitor 28 via the collector and its output is fed back to the base of the TR 31 via a connection midpoint P and a capacitor 27. One terminal of a parallel resonance circuit 20A is connected to the connection midpoint P in the positive feedback loop to constitute an oscillation circuit. Then a high pass filter is formed in the positive feedback loop by the capacitor 35 of a proper capacitance and a low input resistance Ri of a common base TR 32. Thus, the feedback quantity of the positive feedback loop is increased as the frequency increases and nearly stable oscillation intensity is obtained over a wide frequency range such as fmax/fmin<=3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62164182A JP2521963B2 (en) | 1987-07-01 | 1987-07-01 | Oscillator circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62164182A JP2521963B2 (en) | 1987-07-01 | 1987-07-01 | Oscillator circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS648704A true JPS648704A (en) | 1989-01-12 |
| JP2521963B2 JP2521963B2 (en) | 1996-08-07 |
Family
ID=15788263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62164182A Expired - Lifetime JP2521963B2 (en) | 1987-07-01 | 1987-07-01 | Oscillator circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2521963B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02279004A (en) * | 1989-04-20 | 1990-11-15 | Sanyo Electric Co Ltd | Oscillation circuit |
| US5055804A (en) * | 1989-06-21 | 1991-10-08 | Matsushita Electric Industrial Co., Ltd. | Oscillator |
| WO2003010881A1 (en) * | 2001-07-25 | 2003-02-06 | Niigata Seimitsu Co., Ltd. | Oscillator |
| JP2015097341A (en) * | 2013-11-15 | 2015-05-21 | 三菱電機株式会社 | High frequency circuit and high frequency oscillator |
-
1987
- 1987-07-01 JP JP62164182A patent/JP2521963B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02279004A (en) * | 1989-04-20 | 1990-11-15 | Sanyo Electric Co Ltd | Oscillation circuit |
| US5055804A (en) * | 1989-06-21 | 1991-10-08 | Matsushita Electric Industrial Co., Ltd. | Oscillator |
| WO2003010881A1 (en) * | 2001-07-25 | 2003-02-06 | Niigata Seimitsu Co., Ltd. | Oscillator |
| JP2015097341A (en) * | 2013-11-15 | 2015-05-21 | 三菱電機株式会社 | High frequency circuit and high frequency oscillator |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2521963B2 (en) | 1996-08-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080531 Year of fee payment: 12 |