鈮?/div>
1.2:1). The shunt
inductance, L
TEST
, is tuned for parallel resonance with C
O
at f
C
. Typically,
f
OSCILLATOR
or f
TRANSMITTER
is approximately equal to the resonator f
C
.
One or more of the following United States patents apply: 4,454,488 and
4,616,197.
Typically, equipment utilizing this device requires emissions testing and
government approval, which is the responsibility of the equipment manu-
facturer.
Unless noted otherwise, case temperature T
C
= +25擄C鹵5擄C.
The design, manufacturing process, and specifications of this device are
7.
8.
subject to change without notice.
Derived mathematically from one or more of the following directly mea-
sured parameters: f
C
, IL, 3 dB bandwidth, f
C
versus T
C
, and C
O
.
Turnover temperature, T
O
, is the temperature of maximum (or turnover)
frequency, f
O
. The nominal frequency at any case temperature, T
C
, may be
calculated from: f = f
O
[1 - FTC (T
O
-T
C
)
2
]. Typically,
oscillator
T
O
is
approximately equal to the specified
resonator
T
O
.
This equivalent RLC model approximates resonator performance near the
resonant frequency and is provided for reference only. The capacitance C
O
is the static (nonmotional) capacitance between the two terminals mea-
sured at low frequency (10 MHz) with a capacitance meter. The measure-
ment includes parasitic capacitance with 鈥淣C鈥?pads unconnected. Case
parasitic capacitance is approximately 0.05 pF. Transducer parallel
capacitance can be calculated as: C
P
鈮?/div>
C
O
- 0.05 pF.
2.
3.
4.
9.
5.
6.
RF Monolithics, Inc.
Phone: (972) 233-2903
Fax: (972) 387-9148
RFM Europe
Phone: 44 1963 251383
Fax: 44 1963 251510
漏1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
E-mail: info@rfm.com
http://www.rfm.com
RO2179B-031000
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