JPS5769926A - Pll synthesizer receiver - Google Patents
Pll synthesizer receiverInfo
- Publication number
- JPS5769926A JPS5769926A JP14725080A JP14725080A JPS5769926A JP S5769926 A JPS5769926 A JP S5769926A JP 14725080 A JP14725080 A JP 14725080A JP 14725080 A JP14725080 A JP 14725080A JP S5769926 A JPS5769926 A JP S5769926A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- pll circuit
- output
- oscillator
- control
- 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
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
- H03J5/02—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings
- H03J5/0245—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form
- H03J5/0272—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form the digital values being used to preset a counter or a frequency divider in a phase locked loop, e.g. frequency synthesizer
Landscapes
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Superheterodyne Receivers (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Abstract
PURPOSE:To increase the frequency stability with simple constitution. CONSTITUTION:The output of the 1st local oscillator 13 is ampplied to a PLL circuit 14, and control is made so that the output frequency of the 1st local oscillator 13 is NF1 with the frequency dividing ratio code N outputted from a channel selction control section 21 and the control output of the PLL circuit 14. The output of the oscillator 15 is applied to a PLL circuit 16, and control is made so that the frequency of the oscillator 15 is nF2 with the frequency dividing ratio code n outputted from the channel selection control section 21 and the control output of the PLL circuit 16. The output of the oscillator 15 is frequency-divided to 1/M with a fixed frequency divider 17, the result is mixed and frequency-converted with an output frequency fx of a reference frequency oscillator 19 by means of a mixer 18, and applied to the 2nd mixer 5 in a signal path. Thus, the minimum frequency interval changeable by the 2nd local oscillation frequency is 1/M of the minimum frequency interval lockable at the 2nd PLL circuit 23, allowing the oscillation frequency of the 1st PLL circuit 22 and the 2nd PLL circuit 23 to be continuously controlled.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14725080A JPS5769926A (en) | 1980-10-20 | 1980-10-20 | Pll synthesizer receiver |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14725080A JPS5769926A (en) | 1980-10-20 | 1980-10-20 | Pll synthesizer receiver |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5769926A true JPS5769926A (en) | 1982-04-30 |
JPS639684B2 JPS639684B2 (en) | 1988-03-01 |
Family
ID=15425974
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14725080A Granted JPS5769926A (en) | 1980-10-20 | 1980-10-20 | Pll synthesizer receiver |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5769926A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5478010A (en) * | 1977-12-02 | 1979-06-21 | Beltek Corp | Radio receiver |
-
1980
- 1980-10-20 JP JP14725080A patent/JPS5769926A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5478010A (en) * | 1977-12-02 | 1979-06-21 | Beltek Corp | Radio receiver |
Also Published As
Publication number | Publication date |
---|---|
JPS639684B2 (en) | 1988-03-01 |
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