SIST EN 60444-1:2002/A1:2002

SLOVENSKI STANDARD
01-september-2002
Measurement of quartz crystal unit parameters by zero phase technique in a pi-
network - Part 1: Basic method for the measurement of resonance frequency and
resonance resistance of quartz crystal units by zero phase technique in a pi-
network - Amendment A1 (IEC 60444-1:1986/A1:1999)
Measurement of quartz crystal unit parameters by zero phase technique in a pi-network -
- Part 1: Basic method for the measurement of resonance frequency and resonance
resistance of quartz crystal units by zero phase technique in a pi-network
Messung von Schwingquarz-Parametern nach dem Null-Phasenverfahren in einem Pi-
Netzwerk -- Teil 1: Verfahren zur Messung der Resonanzfrequenz und des
Resonanzwiderstandes von Schwingquarzen nach dem Null-Phasenverfahren in einem
Pi-Netzwerk
Mesure des paramètres des quartz piézoélectriques par la technique de phase nulle
dans le circuit en pi -- Partie 1: Méthode fondamentale pour la mesure de la fréquence
de résonance et de la résistance de résonance des quartz piézoélectriques par la
technique de phase nulle dans le circuit en pi
Ta slovenski standard je istoveten z: EN 60444-1:1997/A1:1999
ICS:
31.140 3LH]RHOHNWULþQHLQ Piezoelectric and dielectric
GLHOHNWULþQHQDSUDYH devices
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

NORME CEI
INTERNATIONALE IEC
60444-1
INTERNATIONAL
STANDARD
AMENDEMENT 1
AMENDMENT 1
1999-08
Amendement 1
Mesure des paramètres des quartz
piézoélectriques par la technique de phase nulle
dans le circuit en pi –
Partie 1:
Méthode fondamentale pour la mesure de la
fréquence de résonance et de la résistance de
résonance des quartz piézoélectriques par la
technique de phase nulle dans le circuit en pi
Amendment 1
Measurement of quartz crystal unit parameters
by zero phase technique in a pi-network –
Part 1:
Basic method for the measurement of resonance
frequency and resonance resistance of quartz
crystal units by zero phase technique in
a pi-network
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60444-1 Amend. 1 © IEC:1999 – 3 –
FOREWORD
This amendment has been prepared by IEC technical committee 49: Piezoelectric and
dielectric devices for frequency control and selection.
The text of this amendment is based on the following documents:
FDIS Report on voting
49/442/FDIS 49/445/RVD
Full information on the voting for the approval of this amendment can be found in the report on
voting indicated above.
___________
Page 3
CONTENTS
Add the title of annex B as follows:
Annex B – Updating of some formulae of appendix A
Page 43
Add, after appendix A, the new annex B as follows:
Annex B
(normative)
Updating of some formulae of appendix A
B.1 Purposes
In this annex some formulae of the appendix A are updated, taking into account the modified
calibration procedure of the π-network with a reference resistor R = 25 Ω instead of a short.
n
The formula relating R to the measured voltages is derived for arbitrary values of the
r
reference resistor R . The error of R is taken into account in the error analysis for R .
n n r
The formula for current and drive level of the crystal in the π-network is given. The phase slope
of the crystal inserted in the π-network is derived and the formula for Q is corrected.
eff
60444-1 Amend. 1 © IEC:1999 – 5 –
B.2 The -network terminated by Z = 50 (with power splitter according to
π Ω
figure 5a)
Power splitter
(see figure 5a)
Z
c
R R
Z 4
Z
Z
R R R
3 5 6 Z
R V
B
Z
V
V
AA V V
V AAV
B0
IEC  1019/99
Figure B.1 – Terminated π-network
B.3 Voltage transfer factor of the terminated π-network
In the following an elementary derivation of the voltage transfer factor is presented to provide a
more comprehensive formula.
−1
 
1 1
′
 
= = +
Let R R Z
6 6
 
R Z
 6 
′
V R
B 6
= = =
Then k 0,3649 (B.1)
π
′ ′
V R + R
B 6 7
−1
 
1 1
′ ′  
 
Define = + = + = = 12,5 Ω
R R  R R  R
5 5 6 7 T2
 ′ 
 
R
R + R
 6 7 
where R is the termination resistance at the output of the π-network as seen by the crystal.
T2
′ ′
R
V
B 5
=
Then (B.2)
′′′ ′
V R + Z
A
5 c
−1
 
′ ′ 1 1
 
 
Define R = R R + Z = +
 
3 3 5 c
 
  ′
R
+
R Z
 5 c 
′
′′′
V R
A 3
Then = (B.3)
″ ′
V R + R
A 3 4
60444-1 Amend. 1 © IEC:1999 – 7 –
−1
 
1 1
′ ′
   
Define R = R R + R  = +
2 2 3 4
 
  ′
R
2 R + R
 3 4 
Then, for a power splitter according to figure 5a and disregarding the cables:
″ ′
V R
A 2
= (B.4)
′ ′
...