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參數(shù)資料
| 型號： | KS8630 |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | ENHANCED CALLING LINE IDENTIFIER WITH CALL WAITING |
| 中文描述： | 增強電話線呼叫等待標(biāo)識符 |
| 文件頁數(shù)： | 13/23頁 |
| 文件大?。?/td> | 258K |
| 代理商： | KS8630 |
ENHANCED CALLING LINE IDENTIFIER WITH CALL WAITING
KS8630D
13
PRELIMINARY
Dual Tone Alerting Signal Detection (CAS signal detection)
The 2130Hz and 2750Hz components that are output from each BPF are synthesized, converted into AM
waveform, and used as the analog input to the 8-bit ADC. The synthesized analog signal is converted into digital
data through the ADC and in the given sampling rate. Use this data to find the highest peak (MXB) of the 2440Hz
component (frequency sum). Also, use this MXB to find the highest peak (PK) and lowest peak (BMN) of the 620Hz
component (frequency difference).
Carrier Signal : (2750 + 2130) / 2 = 2440Hz
→
Frequency Sum
Envelope Signal : (2750 - 2130) / 2 = 310Hz
→
Frequency Difference
Figure 12. ADC input signal waveform and calculated peak position
The PK error correction algorithm was applied in KS8630D to reduce the pseudo PK signal generation (from Voice
Noise) as much as possible. PK signals occur in a 620Hz period as shown in FIG 12. Since the PK occurs regularly
for a CAS signal, you can eliminate the pseudo PK using this characteristic. The corrected PK is used to carry out
the CAS detection algorithm.
First comes the CAS_SEEK block operation that checks whethere there is CAS within the channel. This block
uses the fact that MXB and PK signals occur within a specific range when CAS is being transmitted. After the CAS
signal has started the transmission, the gain control is carried out. While the ADC input is maintained at a specific
gain, it takes about 5ms to generate a CASIS signal.
The CAS detection algorithm is carried out immediately when CASIS becomes high.
It takes about 58ms after CASIS becomes high to detect any CAS.
MXB
PK
BMN
Carrier Signal (2440Hz)
Envelope Signal (310Hz)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| KS8630D | ENHANCED CALLING LINE IDENTIFIER WITH CALL WAITING |
| KS86C0104 | 8-Bit CMOS Microcontroller(8位微控制器) |
| KS86C0004 | 8-Bit CMOS Microcontroller(8位微控制器) |
| KS86P0004 | 8-Bit CMOS Microcontroller(8位微控制器) |
| KS86P0104 | 8-Bit CMOS Microcontroller(8位微控制器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| KS8630D | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:ENHANCED CALLING LINE IDENTIFIER WITH CALL WAITING |
| KS8695 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| KS8695-EVAL | 功能描述:EVAL KIT EXPERIMENTAL KS8695 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評估演示板和套件 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 主要目的:電源管理，電池充電器 嵌入式:否 已用 IC / 零件:MAX8903A 主要屬性:1 芯鋰離子電池 次要屬性:狀態(tài) LED 已供物品:板 |
| KS8695P | 功能描述:IC SWITCH 10/100 3PORT 289PBGA RoHS:否 類別:集成電路 (IC) >> 專用 IC 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 類型:調(diào)幀器 應(yīng)用:數(shù)據(jù)傳輸 安裝類型:表面貼裝 封裝/外殼:400-BBGA 供應(yīng)商設(shè)備封裝:400-PBGA（27x27） 包裝:散裝 |
| KS8695P_11 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Integrated Multi-Port PCI Gateway Solution |
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