Electronic potentiometer circuit composed of digital circuits

Figure 4-14 illustrates a digital integrated circuit featuring 16 preset potentiometers for Siniperca electronic circuits. The circuit comprises three main components: an input controller, a presettable counter, an analog electronic switch, and a resistor network. It includes a push-button switch and a controller built with a Schmitt trigger and a four two-input NAND gate (CD4093). The counter is utilized to manage input control, facilitating counting down and the addition and subtraction of states. The configuration includes ICIA and ICIB for subtraction counting based on the number of inputs from the NAND gate. The RS flip-flop (IC1C) controls the down counting of the counter (IC3); when the output is high, IC3 counts up, and when low, it counts down. IC2E functions as a non-inverter, while IC2F governs the counting bit, halting the counting process when the counter reaches the preset value or full bit. The output from IC3 generates a full bit (binary) signal which stops the input pulse counting. The BCD can be preset via the reversible counting IC (ICCDt029) and a BCD switch, allowing for the addition, subtraction, and input of preset count pulses. When the counter reaches its full bit, the controller outputs a signal to the input. The counting process is influenced by the addition of count pulses and subsequently outputs a BCD code. The U/D conversion terminal controls the counting direction; a high level indicates counting up, while a low level indicates counting down. The circuit also incorporates a single 16-channel analog switch (CI, CD4067) along with a resistor network.

The digital integrated circuit described is designed for applications that require precise control over counting and switching operations, effectively integrating multiple functions into a single unit. The architecture leverages a combination of digital logic elements and analog components to achieve its objectives. The Schmitt trigger and NAND gates provide robust control signals, ensuring stable operation in various conditions. The use of presettable counters allows for flexible counting sequences, making the circuit adaptable for different operational needs.

The analog electronic switch (CD4067) plays a crucial role in routing signals through the circuit, enabling the selection of different input channels based on the control logic. This feature is particularly beneficial in applications that require the multiplexing of signals or the selective processing of multiple analog inputs. The resistor network complements the analog switch, providing the necessary impedance matching and signal conditioning to ensure optimal performance.

In summary, this digital integrated circuit exemplifies a sophisticated approach to managing and manipulating both digital and analog signals, making it suitable for various electronic applications that demand precision and flexibility in control mechanisms. The careful integration of components facilitates a streamlined design that enhances functionality while minimizing complexity.Figure 4-14 is a digital integrated circuit consisting of 16 preset potentiometers Siniperca electronic circuits. It consists of three parts: input into the controller. Presett able counter, analog electronic switch and resistor network. Assisted by a push-button switch and the controller Schmitt trigger four two-input NAND gate CD4093 composition. By adding to the counter to control the input, counting down switching pulse counting and addition and subtraction states.

Wherein ICIA, ICIB composition subtraction count the number of input NAND gate. Iclc.rq Hu lying grate RS flip-flop, whose output controls the down counting of the counter IC3 state transition when it outputs a high level, IC3 for counting; low output, IC3 for counting down. IC2E to the non-inverter, IC2F counting bit full control gate when the counter reaches the preset number or the full bit, IC3 output full bit (binary) signal IC2F closed to stop counting pulses input o can be preset count din.

BCD can be preset by the reversible counting ICCDt029 preset number and BCD switch composition for receiving add, subtract and count pulse input preset number b When the count full bit full controller output to the input signal. Counter after receiving the count pulse t by adding, after the down output BCD code. U/D conversion is down counting state control terminal, a high level, the counter for counting; low, the counter for counting down port analog electronic switch and resistor network.

By a single 16-channel analog switches CI, CD4067 16 and resistor networks.