Why is the IQ data on AD9361 inverted?
Seeking support on customer issue with phase shift on IQ data when inputing sine wave that is offset from carrier. See below.... are doing some testing of the multi-chip synchronization features of...
View ArticleRe: ADV7619 h/v locked bits wrong with ADN4605s
Hi Guenter, I've done some tests looking at CP_LOCK_RAW, with CP_LOCK_UNLOCK_EDGE_SEL set to both 1 and 0. The behavior made more sense with it set it to 0, though the CP LOCK event never occurs: it...
View ArticleAD8302: What is the maximum allowable difference in signal amplitudes in...
Hi all,I have a couple of simple questions regarding the spec of the AD8302 RF/IF gain and phase detector.I know that in order to obtain a gain measurement, the maximum allowable difference between the...
View ArticleAbout ADV chip 4K format
Hi,there: Was the ADV7844 -7511 and 7623,those two platforms arm support the 4K video format?And if the chip support the HMDI1.4a means that the chip support the 4k format?
View Articlethe register settings that specify dimensions and formats of ADV7281-M
Are there any registers available in ADV7281-M wherein the frame dimensions & formats could be read & written?The 3 status registers available in ADV7281-M does not provide the information.
View ArticleRe: AD80066 SHA mode input range problem
Problem solved, I turned on the internal reference voltage, and it started to working properly!Thanks!
View ArticleHow to keep the impedance high while using AC coupling with In-amp
Hi dear all,I have a problem with the AD8421 instrumentation amplifier. I need a input impedance at least 100MegΩ. But I want to use the AC coupling in front. That means I have to provide the return...
View ArticleIs ADL5350 a right mixer for my application?
Hi all,I am developing a RF transmitter in the frequency range of 1GHz to 2GHz. basic details are as follows:RF freq band : 1GHz to 2GHzRF Bandwidth : 550MHzIf freq : 140MHzIF Bandwidth : 10MHzLO : low...
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Re: ADV7625 OSD Character color change
Hi Jeyasudha.M When the input source video is RGB(0-255) format ,the OSD menu color also change.May be is the same cause.
View ArticleFingerprint signal processing SW for Blackfin
Dear All, We have a national ID project in Turkey, which all old ID cards will be changed with smart card included new ID cards. We as PAVO electronics design and production company(www.pavo.com.tr)...
View ArticleRe: Analog sharc 21160 processor emulation
I am okay to use the first option. I did not actually thought fopen and fwrite will work since there is specialized functions to dump data to file ADspMemoryType.DumpMemoryToTextFile(). Do u have code...
View ArticleSRAM Initialization on ADSP21369 fails only with SPI bootloader
HiI'm using a ISSI IS61LV5128 SRAM on a company board.The DSP boot is controlled by a LPC4337 microcontroller,, in SPI slave mode.I'm using this SRAM which works very well in the Visual DSP 5.I have an...
View ArticleRe: Re: QPSK GENERATION (MATLAB HDLCODER)
hi dragos, i used two array as shown below, const uint16_t sine_lut_i2[32] = { 0x685E, 0x40FF, 0x32AA, 0x40FF, 0x685E, 0x9C10, 0xCC9C, 0xEE62, 0xF911, 0xEC14, 0xCB3D, 0x9F83, 0x718B, 0x4B32, 0x3362,...
View ArticleRe: How to keep the impedance high while using AC coupling with In-amp
I know bootstrapping will be one possible solution, but I failed to configure it with this amp. Actually I need to configure the buffer as a bootstrapping circuit. And the structure of in-amp has the...
View ArticleRe: How to keep the impedance high while using AC coupling with In-amp
Zifang, Why do you think you need 100 meg? Differential or common mode? If you have a few pF to ground, your frequency responseis only a few Hz..... Harry
View ArticleRe: How to keep the impedance high while using AC coupling with In-amp
I am designing a pre-amp for the neural signal. Because the electrode has a very high impedance in low-frequency range(because it's a capacitive load), so I need a very high input impedance. And I have...
View ArticleRe: How to keep the impedance high while using AC coupling with In-amp
Zifang, What is the threshold current? In other words, if the current is one nanoamp, does it affect theneurons? What about one picoamp? Maybe a JFET InAmp with direct coupling would work? How...
View ArticleAD7675 family, timing questions
Hi all, I'm working with an ADC AD7675 and I'm misunderstanding few parameters about timing. The application is quite simple : a microcontroller is dealing with the ADC and memory. Datas are recorded...
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AD9629 Differential Clock Input
Hi Guys, Question regarding the AD9629 differential clock input. The datasheet (pg.20 - see attached) has the external clock terminated in a 50R load (figure 46) and then feeding into the Mini-circuits...
View ArticlePower up rule for ADXL345
Dear all, In our product board, the product which is not started normally appeared rarely.When the phenomenon occurs, ADXL345 is on SPI communication and does not return a response. It seems that it...
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