Virtual Ground in Single Supply Operation

Generation of a virtual ground is required by single-supply operation. It’s usually required at a voltage equal to Vcc/2. We can use a simple voltage divider produce Vcc/2, but it’s performance deteriorates at low frequency. The values of R1 and R2 are equal, selected with power consumption Vs allowable noise in mind. We can eliminate conducted noise on the voltage […]

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Low-Cost AC Supply

Applying the filtered and rectified AC input to a high-input-voltage linear regulator is the simplest way to produce low current level from an AC source. However, it will causes the power dissipation in the regulator. The power dissipation can be reduced by using a switching regulator but it will increases the cost if we use a switching regulator. This circuit […]

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