Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
TIME BASE INCLUDING OSCILLATOR, FREQUENCY DIVIDER CIRCUIT AND CLOCKING PULSE INHIBITION CIRCUIT
Document Type and Number:
Japanese Patent JP2015171151
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a time base having very high resolution and simultaneously a low maximum instantaneous error.SOLUTION: A time base (2) includes: an oscillator (4) generating a periodic signal (S); a frequency divider circuit (10) formed by a division chain defining several division stages; and a circuit for adjusting a divided frequency (16) by inhibiting, in each inhibition period of a plurality of successive inhibition periods, an integer number of clocking pulses (N) at the input of a given stage (14) of the division chain. The time base is arranged to produce, in each inhibition period, a first real number (N) corresponding to the real number of clocking pulses that must be removed to be precise, and the adjustment circuit is arranged to calculate, in each inhibition period, a second real number equal to the addition of the first real number and the fractional part of the second real number obtained in the preceding inhibition period, the integer part of the second real number defining the number of clocking pulses to be inhibited in each inhibition period.

Inventors:
YVES GODAT
NICOLAS JEANNET
FRANCOIS KLOPFENSTEIN
Application Number:
JP2015039886A
Publication Date:
September 28, 2015
Filing Date:
March 02, 2015
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
EM MICROELECTRONIC MARIN SA
International Classes:
H03B5/32; G06F1/08; H03K23/64; H03L7/00
Domestic Patent References:
JPS5451869A1979-04-24
JPS5122359A1976-02-23
JP2010011389A2010-01-14
JPH0682577A1994-03-22
JPH1020052A1998-01-23
JP2000315121A2000-11-14
JP2003232876A2003-08-22
JP2002374231A2002-12-26
JPH07311289A1995-11-28
JPS5451869A1979-04-24
JPS5122359A1976-02-23
JP2010011389A2010-01-14
JPH0682577A1994-03-22
JPH1020052A1998-01-23
JP2000315121A2000-11-14
JP2003232876A2003-08-22
JP2002374231A2002-12-26
JPH07311289A1995-11-28
Foreign References:
US5748570A1998-05-05
US5748570A1998-05-05
Attorney, Agent or Firm:
山川 政樹
山川 茂樹