參數(shù)資料
型號(hào)： PT4316-XL
廠商： Princeton Technology Corporation
英文描述： Low Power 315/433 MHz OOK/ASK Superheterodyne Receiver with SAW-based Oscillator
中文描述： 低功耗433分之315兆赫元件Ook / ASK超外差接收器與基于SAW振蕩器
文件頁(yè)數(shù)： 7/27頁(yè)
文件大?。?/td> 501K
代理商： PT4316-XL
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
IF LOW-PASS FILTER
The built-in IF filter is composed of three Sallen-Key low-pass filter stages and it has a -3dB bandwidth
of 3.1MHz. One stage Sallen-Key filter and frequency response of three cascaded filters as following
figure.
PT4316 V1.6
- 7 -
August, 2007
Low Power 315/433 MHz OOK/ASK Superheterodyne
Receiver with SAW-based Oscillator
PT4316
SAW OSCILLATOR
The SAW oscillator is configured as a Colpitts oscillator but consists of 3 cascaded amplifiers instead
of a single amplifier. Although the circuit configuration is quite similar to the conventional Colpitts
oscillator, this configuration is capable of generating a much higher value of negative resistance. The
one-port SAW resonator is connected between pin 15 (OSCIN) and pin 16 (OSCOUT).
The capacitor connected from pin 15 (OSCIN) to ground is used for adjusting the oscillation frequency.
In general, this capacitor is unnecessary if the frequency drift can be ignored. The figures at below, an
equivalent circuit of a SAW resonator and its component valuesare, are shown for reference.
*Optional
*C11
SAW Resonator
16
OSCIN
OSCOUT
15
C1
L1
C0
R1
SAW resonator equivalent circuit
Part Number
MFSRA316.2
MFSRA435.2
Center Frequency(MHz)
316.2
435.2
R1 (
)
19
20
L1 (
μ
H)
119.06
86.47
C1 (pF)
0.00213
0.00155
C0 (pF)
2.4
2.0
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