Title:
周波数シンセサイザ
Document Type and Number:
Japanese Patent JP4536946
Kind Code:
B2
Abstract:
A frequency synthesizer that improves a unique DDS characteristic, while maintaining a circuit scale (ROM size) of a direct digital synthesizer (DDS). A first digital signal generator generates a quantized frequency signal, and a second digital signal generator generates a frequency signal having a fine frequency resolution and many spurious signals as compared with the first digital signal generator. A filter performs band rejection on an output of the second digital signal generator, and a mixer mixes an output of the first digital signal generator with an output of the filter.
Inventors:
Takahiko Kishi
Application Number:
JP2001058395A
Publication Date:
September 01, 2010
Filing Date:
March 02, 2001
Export Citation:
Assignee:
SAMSUNG ELECTRONICS CO.,LTD.
International Classes:
H03B28/00; G06F1/03; G06F1/035; H03B21/02; H03L7/00
Domestic Patent References:
| JP9023158A | ||||
| JP2000124740A |
Attorney, Agent or Firm:
Masatake Shiga