Title:
RECEPTION CONTROL METHOD AND DEVICE THEREFOR
Document Type and Number:
Japanese Patent JP3498758
Kind Code:
B2
Abstract:
PURPOSE: To exactly regulate a reception enable frequency band by changing the value of a control voltage setting signal within the range not exceeding upper or lower limit.
CONSTITUTION: The lower limit value and upper limit value of a PWN signal corresponding to the lower limit value and upper limit value of the frequency band of a reception enable broadcasting channel are previously registered on a non-volatile memory 41. When a user inputs a reception frequency by operating an operating part 9, a microcomputer 8 supplies the PWM signal corresponding to that input to a control voltage generating circuit 10. The control voltage generating circuit 10 generates a control voltage Vc corresponding to the inputted PWM signal and outputs a local oscillating signal at a frequency corresponding to this control voltage Vc to a local oscillator 11. When the frequency of the reception channel inputted from the operating part 9 is lower than the lower limit value stored in the non-volatile memory 41 or higher than the upper limit value, the microcomputer 8 generates the PWM signal of that lower limit value or upper limit value as the PWM signal.
Inventors:
Kyoji Baba
Application Number:
JP29420094A
Publication Date:
February 16, 2004
Filing Date:
November 29, 1994
Export Citation:
Assignee:
ソニー株式会社
International Classes:
H03J5/00; H03J5/02; H03J7/18; H04B1/06; H04N5/44; (IPC1-7): H03J5/02; H03J7/18; H04B1/06; H04N5/44
Domestic Patent References:
| JP6314958A | ||||
| JP6292609A | ||||
| JP6310935A | ||||
| JP62137910A | ||||
| JP224628U | ||||
| JP5693029U |
Attorney, Agent or Firm:
Yoshio Inamoto
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