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參數資料
| 型號： | U4255BM-AFNG3 |
| 英文描述： | AM/FM Receiver Circuit |
| 中文描述： | 調幅/調頻接收機電路 |
| 文件頁數： | 8/14頁 |
| 文件大小： | 139K |
| 代理商： | U4255BM-AFNG3 |
U4255BM
Rev. A2, 11-Oct-00
8 (14)
Bit 79 controls the bandwidth of the lowpass filter of the
MPX output.
Bandwidth MPX Lowpass Filter
Bit 79
90 kHz
0
180 kHz
1
The stop counter calculates an average center frequency
during the time wich is set by the Bits 73 to 78.
Time Window
for Stop Signal
Bit
78
Bit
77
Bit
76
Bit
75
Bit
74
Bit
73
1
3.1969 ms
0
0
0
0
0
1
.....
63
3.1969 ms
1
1
1
1
1
1
The demodulator gain for the weather band mode is set by
the Bits 71 and 72.
Demodulator Gain in
Weather Band Mode
Bit 72
Bit 71
5
0
0
10
0
1
20
1
0
50
1
1
For soft mute, the MPX signal level will be reduced
depending on the input signal strength. Bits 68 to 70 set
the input signal field strength, at which the MPX signal
will be reduced by 3 dB (for soft mute). The absolute
value depends on the IF-gain Bit 89 – 91.
Start Soft Mute
Bit 70
Bit 69
Bit 68
at low fieldstrength
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
at high fieldstrength
1
1
1
Bit 67 sets the maximum reduction of the MPX signal level.
Max Value of Soft Mute
Bit 67
30 dB
0
26 dB
1
Temperature coefficient setting of FM IF amplifier.
Temperature Coefficient
(TC) of the IF amplifier
TK 1
Bit 66
0
TK 2
1
Level Control of the FM AGC threshold.
FM AGC Threshold
Bit 65
Bit 64
103 dB V
0
0
97 dB V
0
1
92 dB V
1
0
85 dB V
1
1
Level Control of the AM AGC threshold.
AM AGC Threshold
Bit 63
Bit 62
102 dB V
0
0
105 dB V
0
1
107 dB V
1
0
108 dB V
1
1
Bits 60 and 61 control the bandwidth of the 2nd mixer
output tank, in FM mode.
FM Bandwidth Mixer 2
Bit 61
Bit 60
150 kHz
0
0
200 kHz
0
1
250 kHz
1
0
450 kHz
1
1
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相關代理商/技術參數 |
參數描述 |
|---|---|
| U4255BM-M | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:AM/FM car receiver IC |
| U4255BM-MFN | 功能描述:IC RCVR AM/FM FRONT-END 44-SSOP RoHS:否 類別:RF/IF 和 RFID >> RF 接收器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS 產品變化通告:Product Discontinuation 09/Jan/2012 標準包裝:50 系列:* 頻率:850MHz ~ 2.175GHz 靈敏度:- 數據傳輸率 - 最大:- 調制或協議:- 應用:* 電流 - 接收:* 數據接口:PCB，表面貼裝 存儲容量:- 天線連接器:PCB，表面貼裝 特點:- 電源電壓:4.75 V ~ 5.25 V 工作溫度:0°C ~ 85°C 封裝/外殼:40-WFQFN 裸露焊盤 供應商設備封裝:40-TQFN-EP（6x6） 包裝:托盤 |
| U4255BM-MFNG3 | 功能描述:IC RCVR AM/FM FRONT-END 44-SSOP RoHS:是 類別:RF/IF 和 RFID >> RF 接收器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS 產品變化通告:Product Discontinuation 09/Jan/2012 標準包裝:50 系列:* 頻率:850MHz ~ 2.175GHz 靈敏度:- 數據傳輸率 - 最大:- 調制或協議:- 應用:* 電流 - 接收:* 數據接口:PCB，表面貼裝 存儲容量:- 天線連接器:PCB，表面貼裝 特點:- 電源電壓:4.75 V ~ 5.25 V 工作溫度:0°C ~ 85°C 封裝/外殼:40-WFQFN 裸露焊盤 供應商設備封裝:40-TQFN-EP（6x6） 包裝:托盤 |
| U4256BM | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:Frequency Synthesizer for Radio Tuning |
| U4256BM-AFS | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:Frequency Synthesizer for Radio Tuning |
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