Title:
RF DIVIDER USING DIRECT DIGITAL SYNTHESIS
Document Type and Number:
WIPO Patent Application WO/2012/041852
Kind Code:
A3
Abstract:
An RF divider directly synthesizes a desired RF as a digital pattern that can be programmed and output at a VCO frequency. An exemplary RF divider comprises a pre-sequencer and a parallel-to-serial converter. The pre-sequencer successively outputs consecutive M-bit sections of a parallel word, where the parallel word comprises one or more copies of a frequency dividing bit pattern defining a frequency divisor. The parallel-to-serial converter performs a parallel-to-serial conversion on the M-bit sections of the parallel word based on the fixed radio frequency to generate an output signal having the desired radio frequency, where the output signal comprises a serial bit stream of the parallel word.
Inventors:
MATEMAN PAUL (NL)
HESEN LEONARDUS (NL)
FRAMBACH JOHANNES (NL)
HESEN LEONARDUS (NL)
FRAMBACH JOHANNES (NL)
Application Number:
PCT/EP2011/066769
Publication Date:
July 26, 2012
Filing Date:
September 27, 2011
Export Citation:
Assignee:
ST ERICSSON SA (CH)
MATEMAN PAUL (NL)
HESEN LEONARDUS (NL)
FRAMBACH JOHANNES (NL)
MATEMAN PAUL (NL)
HESEN LEONARDUS (NL)
FRAMBACH JOHANNES (NL)
International Classes:
H03K23/66; H03K23/68
Foreign References:
US20070058767A1 | 2007-03-15 | |||
DE3917432A1 | 1990-12-06 | |||
CN101188600B | 2010-06-23 |
Attorney, Agent or Firm:
STRÖM & GULLIKSSON AB (Malmö, SE)
Download PDF: