المقوم الثنائي المعوض - مسبر التردد اللاسلكي - الصمامات ذات المهبط المسخن

Compensated Diode - Radio Frequency Probe -
Heated Cathode Valves .. Electronics

Compensated Diode

It is known in transistor receivers and amplifiers that the operating conditions of the output transistors that feed the loudspeakers are critical and sensitive conditions, and any error in their bias will either lead to rapid battery discharge and damage or to signal distortion. The base bias may be suitable for the operating conditions when the battery is new, then it becomes unsuitable for it after the device has been running for a certain period. In addition, the operating temperature also affects the performance of the transistor.

Compensated Diode (103) is used to overcome this problem. This is because the resistance of the diode (and thus the operation of the transistor) changes with the temperature in it. If the battery voltage decreases, the current intensity passing through the junction decreases and its resistance increases as a result in a way that makes the base supply more negative than before, so the transistor regains its previous operating conditions.

Wireless Frequency Probe

The point contact diode is characterized by being a semiconductor with a very small internal capacitance, and is capable of operating at very high frequencies. It is very suitable for the wireless frequency probe (104), which is characterized by its ease of use to detect the presence of wireless frequencies at any point in the circuit.

103 - Rectifier to maintain stability of performance.

104 Insulated path used at very high frequencies.