future engineers: contact us:
Future Engineers,
Postal address;P.O.BOX 4516, MBALIZI MBEYA TANZANIA
emails ;nwasp888@gmail.com
Future Engineers,
Postal address;P.O.BOX 4516, MBALIZI MBEYA TANZANIA
emails ;nwasp888@gmail.com
WE PREPARE THE EARLY STUDENT TO FULFILL THEIR FUTURE AND GRADUATES ONE
Friday, August 29, 2014
Thursday, August 28, 2014
future engineers
He is the Tanzanian studied at Azania secondary school and some higher education in Tanzania he was bright since he was in school...he has discovered the Probe thin as small pin (0.250) which can detect the disease in its early sign stages.
FOR MORE INFORMATION KEEP IN TOUCH WITH (www.fengineers.blogspot.com)
Asanterabi Malima
He is the Tanzanian studied at Azania secondary school and some higher education in Tanzania he was bright since he was in school...he has discovered the Probe thin as small pin (0.250) which can detect the disease in its early sign stages.
FOR MORE INFORMATION KEEP IN TOUCH WITH (www.fengineers.blogspot.com)
Monday, August 25, 2014
future engineers
5.5.2. Electronic Tuning
5.5.2. Electronic Tuning
Instead of the capacitor CR, that was used for fine tuning in the previous project, a capacitive (varicap) diode can be used. It’s a special HF diode which is polarized by exposing it to DC voltage in order to be non-permeable (+ to the anode, - to cathode).
By changing the voltage diode’s capacitance also changes, which allows for it to be utilized as variable capacitor. If, acc. to pic.5.13-a, the DC voltage between the cathode and anode (UAK) varies from U1 to U2, diode’s capacitance goes from Cmax till Cmin.
Instead of the capacitor CR, that was used for fine tuning in the previous project, a capacitive (varicap) diode can be used. It’s a special HF diode which is polarized by exposing it to DC voltage in order to be non-permeable (+ to the anode, - to cathode).
By changing the voltage diode’s capacitance also changes, which allows for it to be utilized as variable capacitor. If, acc. to pic.5.13-a, the DC voltage between the cathode and anode (UAK) varies from U1 to U2, diode’s capacitance goes from Cmax till Cmin.
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