L6208 Stepper Motor Controller
This circuit is a L6208 stepper motor controller. To build this circuit, we can implement slow decay. It allows
Read moreAuthor: Adam
Discrete High Current Switch Mode LED Driver
This is a discrete high current switch mode LED driver circuit. The basics of this circuit is a buck-converter principle. The efficiency of this circuit is 80 to 90 %. This circuit can be applied on automotive lighting applications. The advantages of this circuit are low component and low cost. Here is the circuit: The voltage input range of this […]
Read moreWien Bridge Sine Wave Oscillator
Getting the right amplifier loop gain is the major problem in producing a low distortion constant amplitude sine wave. However, we can solve this problem with Wien bridge sine wave oscillator. Here is the circuit : This circuit uses the 2N3069 JFET as a voltage variable resistor in the amplifier feedback loop. The voltage reference for the peak sine wave […]
Read moreLow Drift Sample and Hold
This is a circuit of low drift sample and hold. This circuit uses two JFET, Q1 and Q2 that provides the sample and hold capacitor, C1. Q1 provides a path, Rds(on), for C1 and turned on during sample. Q2 IGSS (<100 pA) and Q1 ID(OFF) (<50 pA) as the only discharge paths because Q1 is turned off, during hold. Here […]
Read more