收藏本站
dsPICDEM? 1.1 Plus Development Board User’s Guide
3.3.1.2
DSP OPERATIONS MODE
From the Menu Options display, pressing switch SW3 launches the DSP Operations
demo, which displays the digital signal values shown in Figure 3-6. This display
provides information on the various signal processing operations that are performed on
the signal at analog input pin, AN3.
FIGURE 3-6:
DSP OPERATIONS DISPLAY
F = 1000
256 PT
IIR
MAIN – s1
B IN = 032
T FFT =018175 CY
T FILT =028649 CY
CHNGFILT – S 2
The DSP operations display shows several parameters for a sampled sine-wave
signal. A fundamental sine-wave signal is generated by stepping the MCP41010 digital
potentiometer (U8) output at an 8 kHz rate. The output of the digital potentiometer is
applied to a Low-Pass (LP) filter with a cutoff frequency of approximately 4 kHz. This
LP filter removes the high-frequency components and yields a sine wave adequate for
this demonstration. Five frequencies are developed and selected by varying
potentiometer RP1, as shown in Table 3-1.
TABLE 3-1:
FREQUENCIES VS. POTENTIOMETER SETTING
Potentiometer Setting
0 ≤ RP1 ≤ 1V
1 ≤ RP1 ≤ 2V
2 ≤ RP1 ≤ 3V
3 ≤ RP1 ≤ 4V
4 ≤ RP1 ≤ 5V
Resulting Frequency
100 Hz
500 Hz
1000 Hz
1500 Hz
2000 Hz
The filtered output of the MCP41010 is routed to pin AN3/RB3, which is an input to the
12-bit ADC. The ADC collects 256 samples from the MCP41010 at an 8 kHz sample
rate. These samples are optionally subjected to a digital filtering algorithm. The
following three digital filtering options are provided and selected by switch SW2:
? None
? Infinite Impulse Response (IIR)
? Finite Impulse Response (FIR)
Subsequently, their spectral components are estimated. The frequency estimate of the
signal on pin AN3/RB3 is displayed on the first row of the DSP Operations display.
DS70099D-page 32
? 2006 Microchip Technology Inc.
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
DM330012 KIT USB STARTER FOR DSPIC33E
DM330013 MICROSTICK DSPIC33F/PIC24H BOARD
DNET1 SURGE SUPPRESSOR ETHERNET RJ45
DR-8094 RACK DOUBLE 84"X20.25"X36" BLK
DR-IAC5E INPUT MODULE AC 5VDC
DRIDC24A INPUT MODULE DC 34MA 24VDC
DRODC24 OUTPUT MODULE DC 13MA 24VDC
DRR-40A MODULE REDUNDANCY 40A DIN RAIL
相关代理商/技术参数
DM300027 功能描述:开发板和工具包 - PIC / DSPIC 16-bit Starter Demo Board RoHS:否 制造商:Microchip Technology 产品:Starter Kits 工具用于评估:chipKIT 核心:Uno32 接口类型: 工作电源电压:
DM-3-000-K 制造商:PacTec 功能描述:Case, Plastic; ABS; Black; 11.46 in.; 3.38 in.; 10.4 in.; UL 94-HB Rated 制造商:PacTec 功能描述:ENCLOSURE, DESKTOP, PLASTIC, BLACK; Enclosure Type:Desktop; Enclosure Material:Plastic; Body Color:Black; External Height - Imperial:3.38"; External Height - Metric:86mm; External Width - Imperial:10.4"; External Width - Metric:264mm;RoHS Compliant: Yes
DM-300-C 制造商:Greenlee Textron Inc 功能描述:DMM 1000V RMS
DM-301 制造商:Labfacility Limited 功能描述:SENSOR PT100 THIN FILM 2X2.3MM CL B 制造商:LABFACILITY 功能描述:SENSOR, PT100, THIN FILM, 2X2.3MM, CL B 制造商:LABFACILITY 功能描述:TEMPERATURE RTD SENSOR, -70C to +500C, 100 OHM; Sensing Temperature Min:-70C; Sensing Temperature Max:+500C; Resistance:100ohm; Sensor Terminals:Through Hole; Temperature Sensing Range:-70C to +500C ;RoHS Compliant: Yes
DM30103J 制造商:ELMCO 功能描述:
DM30113G 制造商:n/a 功能描述:DM30X311 S7C8B
DM30-113G 制造商:n/a 功能描述:DM30X311 S7C8B
DM30133J 制造商:n/a 功能描述:DM30X313 S7C8B