Analog and audio

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Sometime ago, I've built-up a simple single-sided test brd where I could plug-in a TDA72xx series family power amp without a pre-amp. It works supremely. I advanced the design to include a front-end with or without a pre-amp. Under the same design, same configuration, following the same app note to the tee, the TDA7269A amp attempts to start up and immediately shuts down.If anyone has any suggestions to try, I would be happy to try them.Thanks,Dave

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I am using the STuW81300 as LO generator to generate 12GHz LO. Although I am able to get the frequency out correctly and the PLL is also locking the output power of the signal us at -39dBm (probing) where ideally it should be giving close to -4dBm. The is some difference in the LOOP FILTER section of my schematic compared to the EVB schematic. Other than this I cannot understand why it is not giving the said output power. I seriously doubt that this could be the cause for this as the PLL is locking and I am able to generate the required frequency.I am also attaching the Schematic for reference as well as the register initialisation mapping is also given below.Register Initialisation,0x9,0x480000000x8,0x40000003,0x7,0x390000000x6,0x300010000x5,0x280000000x4,0x200391150x3,0x180080020x2,0x1000000A0x1,0x094000010x0,0x03E0003C

Hello, I want to send data to the DAC with the I2S protocol (assume we are sending an array) and see a sine wave at the output.At this point, I would like to ask: Does the DAC in the stm32f407vg model mean the CS43L22 IC or an internal DAC unit in it, and as far as i know, the CS43L22 IC can communicate over i2s, can we communicate with the internal DAC over the i2s line?Finally, I have the stm32f429l board. Can I communicate this board with the DAC via the i2s line? Or should I procure an external DAC IC?Thank you in advance for your answers and help.

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Im looking to find the threshold limit of Open Circuit protecion of an output channel, ive looked in all the datasheets but im sure it was around 1K ohm but i cant find a value anywhere. Does anyone know where i can get this data?ThanksJames

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Need an operational amplifier for the video signal booster, with bandwidth >85MHz, able to work to a 75 Ohm line loads. I find the TSH114, but see the "obsolete" status. How name of the renewed one? Thank you.

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I have q question about TS393 comparator.Datasheet says : Wide single supply range 2.7 V to 16 V or dual supplies (±1.35 V to ±8 V)I dont understand dual supplies condition.What does mean "dual supplies (±1.35 V to ±8 V)"?

We are selecting this device as a substitute for our usual component. The output will only need to 'sink' 5.5 mA current. The 12V supply rail is well-regulated.

Requested items are:49888R:     IC VN 800 PS-E                 SO 8 SMD ST                           VN800PSTR-E46602R:     Diode SMBJ 33 CA           DO 214AA SMD ST                           SMBJ33CA-TR46582R:     IC TS 321 AILT             SOT 23-5 SMD Herst: ST         TS321AILT / Code K40246591R:     IC LD 1117 DT 33       

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LM2903YST -Is that abnormal that COO CN has bottom mark while COO PH without bottom mark.

my old tea2025b speaker stopped working ,can i use this ic to make new stereo speakers or there is another better ic for making speakers ?

Good afternoon!Please rate my first experience in analog circuitry.The following task was released: to develop low cost a DC overload protection circuit (cut-off consumption more than 1.8A).Explanations for the scheme:A low-pass filter was made on the R6,C5. The OpAmp U1 amplifies the voltage drop across R9, then OpAmp U2 in the comparator mode compares with the reference voltage from U3 (TL431 is used as its voltage reference).If the load is consumed more than the adjusted (R14 and R10), the latch is activated on transistors Q4 and Q3, next is opened Q5, the gate of Q2 is attracted to the ground, the load circuit is broken, LED D2 signals user about a malfunction. The latch on Q4 and Q3 remains on until the main power is reconnected.R5, C4 is delay line for gate Q2. This need for exclude the case of a problem with the load when applying power. The power supply circuit of the protection circuit occurs through D1, C1. After 3ms (time for R5, Q4), the load is switched on. In the event of

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Just wondering if ST provides a SPICE library for the TS985 comparator? I haven't used many parts from ST and could help with any advice. My goal would be to simulate the comparator within LTSpice.Thanks,Alan

Hi,This is my previous question(link).I'm implementing 24bit, 44.1kHz audio out code using STM32H7B3-discovery.In previous question, i set SAI(I2S format) buffer like below.I set SAI_A block to output.And, this is my SAI_A setting.​​I set tx buffer to zero and BufferOutCtl.buff also filled zero.​This is my output waveform.​I thought that if I filled the buffer with 4 bytes of data and sent it to dma, it would be as below.But, I got noise waveform.​I checked clock.​LRCK : 44.1kHzMCLK : 11.29MHz​​​​This is main code.  #define FULL_TXRX_SIZE 256 #define HALF_TXRX_SIZE 128   ALIGN_32BYTES (static AUDIO_IN_BufferTypeDef BufferInCtl) __attribute__((section(".RAM_D3"))); ALIGN_32BYTES (static AUDIO_OUT_BufferTypeDef BufferOutCtl) __attribute__((section(".RAM_D3")));       int main(void) { uint16_t b_cnt = 0, b_ptr = 0;   BSP_AUDIO_Init_t out_aduio; BSP_AUDIO_Init_t in_aduio; uint32_t pin_state = 0;   /* Configure the MPU attributes as Write Through for

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I have a BLDC motor drive that uses the TSC2011 in each phase leg to sense phase current. When I am PWMing the phase to inject current to drive the motor, I am getting additive noise on the TSC2011. The output sense from the device increases/decreases in magnitude substantially. This happens whether or not current is actually flowing through the device. I am PWM'ing at 100 kHz, although I have done it at 10 kHz and noticed the same effect. It appears that the PWM edges are causing an offset and noise to be added to the output signal. Any insight as to why this may be happening?

Hello,I am planning to build amplifier based on single TDA7293 SoC, in class G (as described in technical note). I have 2 voltages, +22/-22 and +45/-45V. The speaker has 4 ohms. Can TDA7293 handle the 100W RMS power, or it is too much for single chip and I should use bridge model (two TDA7293 connected master-slave)?When bridged, may I use same supply voltage?The frequency is limited to range 10Hz- 150Hz.best regardsM.

Hello, I am interested in using theTSV791/2 for ADC driver and reference buffer purposes.The reference buffer needs to both source AND sink significant amounts of current (mA) and I am interested in the amplifier's transient response.I did not see an output impedance vs frequency graph on the part's datasheet, and was wondering if such characterization data exists for this part?The SPICE model simulation indicates that it is no more than 2.2Ohms at high frequency, but I would like to know if there is test data to support this simulation result.Thank you.