grid bias meaning in Hindi

Examples

1. Grid bias is most often provided by a cathode resistor.
2. Grid bias batteries are still manufactured today, but not for radio use.
3. The resistor R1 sets the grid bias; both the input and output are tuned circuits with inductive coupling.
4. For vacuum tubes, a grid bias voltage is often applied to the grid electrodes for the same reason.
5. The negative resistance of older tetrode tubes was around 10k?-20k?, and can be controlled by varying the control grid bias.
6. This is often exploited in R . F . amplifiers where an alteration of the grid bias changes the mutual conductance and hence the gain of the device.
7. Some valves, such as the 811A, are designed for " zero bias " operation and the cathode can be at ground potential for DC . Valves that require a negative grid bias can be used by putting a positive DC voltage on the cathode.
8. The resultant radio receiver required a 90 volt HT plus a 4 volt LT ( A and B ) battery ( the HT battery provided not only 82.5 volts for the HT but also two grid bias supplies at-1.5 volts and-7.5 volts ).
9. A "'grid-leak detector "'is a thermionic valve ( UK, Australia, NZ etc . ), or vacuum tube ( USA ), circuit used in older vacuum tube grid bias voltage necessary for proper operation from grid current that occurs in all vacuum tubes due to electrons attracted to the grid during the positive part of the RF cycle.