These are classified into class 1, class 2 amplifiers. Applications include filtering, oscillator tuning, EMI suppression, smoothing circuits, and coupling applications. The dielectric of the mica capacitors is made by using thin mica plates of high quality, one side of which is partly covered with a layer of silver.
The largest capacitance capacitors can attain values of 1µF, even though these are unusual. Silver mica capacitors are typically rated for voltages between 100 & 1000 volts, though there are particular high-voltage mica capacitors designed for RF TX employ which are rated at up to 10 kV.
The characteristics of the mica capacitor include the following Accuracy and Tolerance The values of smallest tolerance of a silver mica capacitor can be as low as ±1%. This is much superior than almost all other kinds of capacitors. In contrast, positive ceramic capacitors can include tolerances of up to ±20%. Stability
A stacked mica capacitor is made of thin mica sheets arranged one over another and separated by thin metal sheets of copper or aluminum. The entire unit is enclosed in a plastic case to protect it from mechanical damage and moisture. Thin mica sheets are used to make the capacitor, and they are arranged one over another. Terminals are connected at each end of the mica capacitor.
The dielectric of the mica capacitors is made by using thin mica plates of high quality, one side of which is partly covered with a layer of silver. The value of capacitance is determined by the number of plates, these being joined in parallel.
Silver mica capacitors are made by coating either side of mica sheets with silver, which act as electrodes. The mica sheets, placed between metal sheets, act as the dielectric that opposes the flow of electric current in these capacitors.