GB1011920A - Improvements in or relating to frequency modulated crystal controlled electric oscillators - Google Patents
Improvements in or relating to frequency modulated crystal controlled electric oscillatorsInfo
- Publication number
- GB1011920A GB1011920A GB1214561A GB1214561A GB1011920A GB 1011920 A GB1011920 A GB 1011920A GB 1214561 A GB1214561 A GB 1214561A GB 1214561 A GB1214561 A GB 1214561A GB 1011920 A GB1011920 A GB 1011920A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frequency modulated
- series
- relating
- controlled electric
- crystal controlled
- 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
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C3/00—Angle modulation
- H03C3/10—Angle modulation by means of variable impedance
- H03C3/12—Angle modulation by means of variable impedance by means of a variable reactive element
- H03C3/22—Angle modulation by means of variable impedance by means of a variable reactive element the element being a semiconductor diode, e.g. varicap diode
- H03C3/222—Angle modulation by means of variable impedance by means of a variable reactive element the element being a semiconductor diode, e.g. varicap diode using bipolar transistors
Landscapes
- Oscillators With Electromechanical Resonators (AREA)
Abstract
1,011,920. Frequency modulation. A.T. & E. (BRIDGNORTH) Ltd. March 6, 1962 [April 5, 1961], No. 12145/61. Drawings to Specification. Heading H3R. A series resonant crystal, a variable inductor and a back-biased semi-conductor variable capacitor series resonant with the inductor at the crystal series resonance frequency are connected in series between a transistor emitter and a capacitive tapping of the resonant collector circuit of a transistor oscillator, so that modulation applied through an R.F. choke across the diode capacitor produces a frequency modulated output. The base is at R.F. earth potential but is biased to vary the oscillation amplitude from a potentiometer across the operating potential.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1214561A GB1011920A (en) | 1961-04-05 | 1961-04-05 | Improvements in or relating to frequency modulated crystal controlled electric oscillators |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1214561A GB1011920A (en) | 1961-04-05 | 1961-04-05 | Improvements in or relating to frequency modulated crystal controlled electric oscillators |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1011920A true GB1011920A (en) | 1965-12-01 |
Family
ID=9999167
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1214561A Expired GB1011920A (en) | 1961-04-05 | 1961-04-05 | Improvements in or relating to frequency modulated crystal controlled electric oscillators |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1011920A (en) |
-
1961
- 1961-04-05 GB GB1214561A patent/GB1011920A/en not_active Expired
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