參數(shù)資料
型號(hào)： UPC2533
廠商： NEC Corp.
英文描述： AM TUNER FOR ELECTRONIC TUNING CAR RADIOS
中文描述： 上午調(diào)諧器電子調(diào)諧汽車收音機(jī)
文件頁(yè)數(shù)： 11/36頁(yè)
文件大?。?/td> 212K
代理商： UPC2533
11
μ
PC2533
2. Operation of Each Block
2.1 FR Amplifier Circuit Block
Fig. 2-1 RF Ampliier Circuit
V
CC
LPF
L4
L5
C6
33
C3
C4
C5
C7
30
35
36
34
+
C2
C1
L2
L1
Q2
Q1
L3
C9
+
R2
R1
C8
MIX1
RF AGC
L
O
/DX
Note
4
From MIX2
Note
L
O
: 3 V or higher
DX : 1 V or lower
In the AM band, the capacitance of a car radio antenna depends on its length, diameter, cable length, etc. Therefore,
J-FET is used in the
μ
PC2533 to raise RF input impedance.
Since the
μ
PC2533 raises the first IF (intermediate frequency) to 10.71 MHz, there is no need for a tuning circuit
between the RF amplifier circuit and MIX1. Instead, it employs an LPF (about 6 MHz) consisting of L4, L5 and C3
to C5 between the RF amplifier circuit and MIX1 in order to cut image frequency (21.4 MHz or higher). Because this
allows a wide-band RF amplifier circuit to be configured without using a tuning circuit, frequency sensitivity deviation
can be minimized to a high degree.
The AGC circuit consists of RF AGC1 by the PIN diode connected to the FET gate and RF AGC2 by the cascade
transistor Q1. Use a low-noise transistor even with low current for the cascade transistor Q1 (if a high-noise one is
used, the S/N ratio deteriorates).
Remark
Set bias voltage for cascade transistor Q1 to V
C
> V
B
.
相關(guān)PDF資料
PDF描述
UPC2539GS DIODE ZENER DUAL ISOLATED 200mW 6Vz 20mA-Izt 0.05 5uA-Ir 3.5 SOT-363 3K/REEL
UPC2539 CONN RCPT MALE 35POS WALL MT
UPC2710TB-E3 122 x 32 pixel format, Compact LCD size
UPC2710TB 5 V, SUPER MINIMOLD SILICON MMIC MEDIUM OUTPUT POWER AMPLIFIER
UPC2710T 1.5 GHz SILICON MMIC WIDE-BAND AMPLIFIER
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
UPC2533GS-01 制造商:NEC 制造商全稱:NEC 功能描述:AM TUNER FOR ELECTRONIC TUNING CAR RADIOS
UPC2533GS-02 制造商:NEC 制造商全稱:NEC 功能描述:AM TUNER FOR ELECTRONIC TUNING CAR RADIOS
UPC2535GH-2A5 制造商:未知廠家 制造商全稱:未知廠家 功能描述:FM Receiver Circuit
UPC2539 制造商:NEC 制造商全稱:NEC 功能描述:RDS DATA DEMODULATOR IC
UPC2539GS 制造商:NEC 制造商全稱:NEC 功能描述:RDS DATA DEMODULATOR IC
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*