The power supply shown in Figure 1 has two ranges, allowing more voltage at a lower current or more current at a lower voltage. Single-range supplies can output maximum power only at full-scale voltages and full-scale current. A linear supply can provide output power that is close to maximum at full scale for both ranges.
A linear power supply also exhibits low ripple and noise, tolerates ambient temperature changes, and is highly reliable due to its circuit simplicity. The linear regulator is controlled by a DAC driven by a digital circuit that provides a voltage proportional to the program voltage.
While the performance of linear power supplies is very good, they are larger and more costly than their switch mode power supply relations, and the performance of the SMPS units is improving all the time. One major area where linear power supplies are almost always used is for audio visual applications, hi-fi amplifiers and the like.
Linear regulated power supplies gain their name from the fact that they use linear, i.e. non-switching techniques to regulate the voltage output from the power supply. The term linear power supply implies that the power supply is regulated to provide the correct voltage at the output.
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Linear Power Supply: linear regulated supply Linear regulated power supplies are able to offer exceedingly low levels of output noise and good stabilisation, but at the expense of size and efficiency.
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The power supply shown in Figure 1 has two ranges, allowing more voltage at a lower current or more current at a lower voltage. Single-range supplies can output maximum …
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