NL7507121A - Tunable UHF oscillator with capacity diode in current circuit - has resistor to junction with capacitor feeding variable voltage at long time constant - Google Patents

Tunable UHF oscillator with capacity diode in current circuit - has resistor to junction with capacitor feeding variable voltage at long time constant

Info

Publication number
NL7507121A
NL7507121A NL7507121A NL7507121A NL7507121A NL 7507121 A NL7507121 A NL 7507121A NL 7507121 A NL7507121 A NL 7507121A NL 7507121 A NL7507121 A NL 7507121A NL 7507121 A NL7507121 A NL 7507121A
Authority
NL
Netherlands
Prior art keywords
capacitor
time constant
current circuit
junction
resistor
Prior art date
Application number
NL7507121A
Other languages
Dutch (nl)
Original Assignee
Philips Nv
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 Philips Nv filed Critical Philips Nv
Priority to NL7507121A priority Critical patent/NL7507121A/en
Publication of NL7507121A publication Critical patent/NL7507121A/en

Links

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
    • H03B5/02—Details
    • H03B5/04—Modifications of generator to compensate for variations in physical values, e.g. power supply, load, temperature
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/02—Details
    • H03J3/16—Tuning without displacement of reactive element, e.g. by varying permeability
    • H03J3/18—Tuning without displacement of reactive element, e.g. by varying permeability by discharge tube or semiconductor device simulating variable reactance
    • H03J3/185—Tuning without displacement of reactive element, e.g. by varying permeability by discharge tube or semiconductor device simulating variable reactance with varactors, i.e. voltage variable reactive diodes

Landscapes

  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

Tunable UHF oscillator with a variable capacity diode and a capacitor connected in the current circuit. The capacitor (29) has a capacity which is several times smaller than the maximum capacity of the variable capacity diode (28). A resistance (32) is connected to the junction point between the variable capacity diode and the capacitor. This is used to feed the variable tuning voltage to the variable capacitor diode. The time constant which is formed by the resistance and the capacitor is smaller than 10 times the period of the lowest oscillator frequency. It is in the region of three time the length of the period of the lowest oscillator frequency.
NL7507121A 1975-06-16 1975-06-16 Tunable UHF oscillator with capacity diode in current circuit - has resistor to junction with capacitor feeding variable voltage at long time constant NL7507121A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL7507121A NL7507121A (en) 1975-06-16 1975-06-16 Tunable UHF oscillator with capacity diode in current circuit - has resistor to junction with capacitor feeding variable voltage at long time constant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7507121A NL7507121A (en) 1975-06-16 1975-06-16 Tunable UHF oscillator with capacity diode in current circuit - has resistor to junction with capacitor feeding variable voltage at long time constant

Publications (1)

Publication Number Publication Date
NL7507121A true NL7507121A (en) 1976-04-29

Family

ID=19823961

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7507121A NL7507121A (en) 1975-06-16 1975-06-16 Tunable UHF oscillator with capacity diode in current circuit - has resistor to junction with capacitor feeding variable voltage at long time constant

Country Status (1)

Country Link
NL (1) NL7507121A (en)

Similar Documents

Publication Publication Date Title
JPS56145775A (en) Switching control type power source circuit
JPS5652906A (en) Oscillating circuit
ES376437A1 (en) Electronically tuned oscillator
NL7507121A (en) Tunable UHF oscillator with capacity diode in current circuit - has resistor to junction with capacitor feeding variable voltage at long time constant
JPS5528677A (en) Frequency conversion circuit
GB1093164A (en) Improvements in or relating to electric oscillators
FR2336826A1 (en) Transistor oscillator tunable over wide frequency range - operates in VHF and UHF range and uses feedback impedance between transistor emitter and collector
JPS5783905A (en) Pulse impatt diode oscillator
SU505122A1 (en) Pulse generator
FR1605341A (en) Variable capacitance diode or varactor device - brass rod in terminal element to adjust shunt capacitance across diode
JPS5723334A (en) Tuning circuit equipped with vco
JPS5534549A (en) Voltage control oscillator
JPS5631222A (en) Sawtooth wave generating circuit
SU723762A1 (en) Controlled generator
KR840001691Y1 (en) Wide-band voltage-controlled square wave generator
JPS54157015A (en) Electronic channel selection unit
JPS5467301A (en) Channel selector
SU136910A1 (en) Device for differentiating the voltage envelope
JPS57129004A (en) Piezoelectric oscillator
JPS54101371A (en) Electronic watch
FR2384382A1 (en) Voltage controlled oscillator for TV, etc. - has two varactor diodes supplied with same control volts when this lies above given level
JPS54111743A (en) Switch circuit
GB1122355A (en) Improvements in and relating to sawtooth generators
JPS53114334A (en) Oscillator circuit
JPS5658316A (en) Automatic tuner of variable capacitor type