TDA6103Q having a feedback factor of the test circuit

The TDA6103Q test circuit features a feedback factor of 1/150. Input signals Vi1, Vi2, and Vi3 are directed through an input resistor network that includes capacitors to the TDA6103Q pins 1, 2, and 3, which are part of the differential input stage. The inverting input terminal and the non-inverting input terminal receive these signals. The amplified output signal is produced from pins 7, 8, and 9, and is routed through an output network consisting of resistors R2, R3, and capacitors Cn, C8, and C9, leading to probe pin 3. The feedback network comprises resistor R5 in parallel with capacitor Cpar, connected between pins 2 and 8; resistor R4 in parallel with capacitor Cpar between pins 2 and 8; and resistor R6 in parallel with capacitor Cpar between pins 3 and 7, which serves the function of automatic black level stabilization.

The TDA6103Q is a versatile integrated circuit primarily used in video signal processing applications. In this configuration, the circuit is designed to amplify input signals while maintaining a stable feedback mechanism to ensure optimal performance. The feedback factor of 1/150 indicates that the circuit is set to provide a moderate level of gain, suitable for various signal conditions.

The input resistor network serves to condition the incoming signals Vi1, Vi2, and Vi3, which may originate from different sources such as video cameras or other video processing units. The capacitors in this network filter high-frequency noise, allowing only the desired signal frequencies to pass through to the differential inputs of the TDA6103Q. Pins 1, 2, and 3 are crucial as they define the differential input stage, where the circuit compares the inverting and non-inverting inputs to generate the amplified output.

The output network, composed of resistors R2 and R3 and capacitors Cn, C8, and C9, is responsible for shaping the output signal and ensuring that it meets the required specifications for further processing or display. The arrangement of these components can influence the bandwidth and frequency response of the output signal, allowing for fine-tuning based on application needs.

The feedback network, which includes resistors R4, R5, and R6 in conjunction with the capacitor Cpar, plays a critical role in stabilizing the output signal. By providing feedback from the output to the input, these components help to regulate the gain and maintain the desired signal integrity. The configuration ensures that variations in input signal levels do not adversely affect the output, thus achieving automatic black level stabilization. This feature is particularly important in video applications, where consistent brightness and contrast levels are essential for high-quality image reproduction.

Overall, the TDA6103Q test circuit is a well-structured design that effectively manages video signal amplification and stabilization, making it suitable for various electronic applications in the field of video processing.As shown in FIG TDA6103Q test circuit with feedback factor is 1/150. Input signal Vi1, Vi2, Vi3 through the input resistor network consists of capacitors into the TDA6103Q 1,2,3 feet, 2, 3 feet and 5 feet are inside the differential input stage of the inverting input terminal and inverting input terminal. The amplified signal from 9,8,7 feet respectively output through the output network of R2, R3, Cn, C8, C9 composed of between 1 to probe to the probe pin 3.1,9 resistor R5 in parallel with the capacitor Cpar composition feedback network; 2,8 feet between the resistor R4 in parallel with the capacitor Cpar feedback network consisting; 3,7 feet between the resistor R6 and the capacitor connected in parallel Cpar feedback network from the current automatic black level stabilizing role.