Implementing a Noise Cancellation System with the TMS320C31
Texas InstrumentsThis paper is concerned with the digital implementation of spectral subtraction modified algorithm on a Texas Instruments (TI)(tm) TMS320C31 Digital Signal Processor (DSP). The algorithm was developed to suppress a car noise in speech picked up by one microphone in a running car for application in mobil hand-free telephony. The real-time implementation on floating-point processor is described. The
Demo/Test CODEC System with TLV320AIC20/21/24/25 EVM
Texas InstrumentsA demo/test system has been built as a simple example for using the TLV320AIC20/21/24/25 codecs. The hardware part of the system includes the ?AIC20/21/24/25 EVM boards an AIC development interface board and a TMS320C5402 DSP DSK board. The C54xx software in assembly and C is implemented on the ?C5402 DSP. A 2-device 4-channel and a 6-device 12-channel codec system are presented in this appl
OA-28 Low-Sensitivity, Bandpass Filter Design with Tuning Method (Rev. C)
Texas InstrumentsThis application report covers the design of a Sallen-Key bandpass biquad. It gives a design with low component and op amp sensitivities. Then it gives a filter tuning method to compensate for parasi
Choosing an Appropriate Pull-up/Pull-down Resistor for Open Drain Outputs
Texas InstrumentsTPS62067, TL7759 Choosing an Appropriate Pull-up/Pull-down Resistor for Open Drain Outputs
Single Chip Data Acquisition System Simplifies Analog-to-Digital Conversion
Texas InstrumentsAN-193 Single Chip Data Acquisition System Simplifies Analog-to-Digital Conversion
MODBUS Bridge using Stellaris
Texas InstrumentsThis application report describes the implementation of the MODBUS bridge using Stellaris® microcontrollers. The idea is to add the functionality of converting MODBUS TCP packets into MODBUS Serial packets on the MDL-S2E which can be used to interface existing MODBUS Serial devices to Ethernet.
AN-1038 LM2825 Application Information Guide (Rev. D)
Texas InstrumentsThis application note provides information on the LM2825 application.
DN505 -- RSSI interpretation and timing (Rev. D)
Texas InstrumentsDN505 -- RSSI interpretation and timing
Band-Pass Filter Design Techniques for High-Speed ADCs
Texas InstrumentsSeveral well-known methods exist for designing passive inductor-capacitor (LC) filters with resistive load terminations. However when LC filters are used to drive the analog input pins of a high-speed analog-to-digital converter (ADC) special consideration must be given to the ADC input impedance. Not accounting for the ADC input impedance often results in a filter design that does not meet the
Interfacing the ADS786x to TMS470 Processors
Texas InstrumentsThis application report presents methods of interfacing the ADS7866/67/68 12/10/8-bit SAR analog-to-digital converter to the serial peripheral interface (SPI) port of the TMS470 processors. The flexible clocking scheme of the TMS470 SPI port along with its internal 16-bit shift register provides an easy hardware/software interface to this series of high-speed micro power SAR converters.
Application Parameter Settings for TMS320DM365 H.264 Encoder
Texas InstrumentsTexas Instrument's TMS320DM365 H.264 video encoder is a flexible implementation of the H.264 video encoder standard. It supports various profiles and features each of which can be independently selected set or controlled. This flexibility enables the TMS320DM365 H.264 video encoder to be used in a variety of different applications. This application report lists the different parameters that can
DLP® Pico Discrete LED driver design guide & LM3434 Application Note
Texas InstrumentsThis application note presents the operation principles for PWM LED driver control interface on DLP® Pico ASICs along with the driver performance assessment on DLP® projection display. Section 4 of the application note introduces LM3434 as the discrete LED driver on Pico products and includes the schematic, O-scope performance measurement, and design guidelines for mainstream LED products.
The application notes apply to DLPC6401 and DLPC2607 as long as the PWM driver controls the interface. The same LM3434 schematic can be adopted with the appropriate changes per LED Vf and If driving specification.
A DSP/BIOS AD50 Codec Device Driver for the TMS320C5402 DSK (Rev. A)
Texas InstrumentsA DSP/BIOS AD50 Codec Device Driver for the TMS320C5402 DSK Application Report
Packaging Limits Range of Linear Regulators
Texas InstrumentsThe power limitations of the physical packaging for a linear regulator device can limit the total output current or the input-to-output voltage differential. This inherent limitation is not always apparent from the product data sheet and must be evaluated during the design phase. This application note shows how the package can limit the operating envelope of a linear regulator.
MSP430 Competitive Benchmarking (Rev. C)
Texas InstrumentsThis application report contains the results from benchmarking the MSP430 against microcontrollers from other vendors. IAR Systems' Embedded Workbench development platform was used to build and execut
Input and Output Characteristics of Digital Integrated Circuits at 3.3-V Supply
Texas InstrumentsThis application report contains a comprehensive collection of the input- and output-characteristic curves of integrated circuits from various 3.3-V logic families. These curves go beyond the information given in data sheets by providing additional details regarding the characteristics of the components. This knowledge is particularly useful when for example a decision must be made as to which c
Closed Loop Compensation of a Synchronous Switching Charger Using bq2472x/3x
Texas InstrumentsDesign of the loop compensator is one of the key challenges in the circuit design of a switching charger. This application report presents the internal control loop operation of the bq2472x/3x as well
Designing the TMS320C548/9 DSP Development Board
Texas InstrumentsThis application brief describes the design of the Texas Instruments (TI™) TMS320C548/9 development board (DVB) from both the hardware and software approach. The DVB is a simple stand-alone application board used to evaluate the performance and characteristics of the TMS320LC548-80 TMS320LC549-80 and TMS320VC549-80 digital signal processor (DSP) hardware and software.
The TMS320C548/9 DV
Specifications and Architectures of Sample-and-Hold Amplifiers
Texas InstrumentsApplication Note 775 Specifications and Architectures of Sample-and-Hold Amplifiers
