0-15 Volt Tracking PS

Description: The linear dual tracking power supply, shown in the schematic, provides 0-15 volts, at 1/4 amp, maximum, using a discrete transistor regulator with op-amp feedback to control the output voltage. The supply was constructed in 1975; the negative output voltage tracks the positive output voltage. More: With reference to the schematic, lamp, LP2, is a power-on indicator. There is no adjustable current limiter in this unit, although R1, D2, and D3 set the current limit to approximately 0.25 amps on the positive side, and R15, D9 and D10 set the current li

The linear dual tracking power supply circuit is designed to deliver a regulated output voltage ranging from 0 to 15 volts with a maximum current output of 0.25 amps. The core of the power supply utilizes a discrete transistor regulator, which is complemented by an operational amplifier (op-amp) for feedback control. This feedback mechanism is essential for maintaining stable output voltage despite variations in load conditions.

The circuit's design incorporates both positive and negative output voltages, which track each other to ensure balanced performance. This feature is particularly important in applications that require dual polarity supplies, such as operational amplifiers or analog signal processing circuits. The tracking nature of the outputs allows for consistent performance across a range of applications.

The power-on indicator, represented by lamp LP2, provides a visual cue when the power supply is active, enhancing user experience and safety by indicating operational status.

Current limiting is implemented in the circuit to protect against overcurrent conditions. Resistor R1, along with diodes D2 and D3, establishes a current limit on the positive output side, effectively capping the output at approximately 0.25 amps. Similarly, the negative side employs resistor R15 and diodes D9 and D10 to ensure that the output current does not exceed the specified limit. While there is no adjustable current limiter present, this fixed current limiting design serves to protect the circuit components from potential damage due to excessive current draw.

Overall, this power supply design exemplifies a robust approach to providing regulated dual output voltages, suitable for various electronic applications requiring reliable voltage sources.The linear dual tracking power supply, shown in the schematic, provides 0-15 volts, at 1/4 amp, maximum, using a discrete transistor regulator with op-amp feedback to control the output voltage. The supply was constructed in 1975; the negative ouput voltage tracks the positive output voltage. With reference to the schematic, lamp, LP2, is a power-on indicator. There is no adjustable current limiter in this unit, although R1, D2, and D3 set the current limit to approximately 0.25 amps on the positive side, and R15, D9 and D10 set the current li