A.  Calculate DC Voltage Divider Bias Enter Voltage:    Enter R1:   Enter R2:       Bias voltage  =

B.  Calculate Inductive Reactance Enter Inductance in uH:    Enter Freq in MHz:       XL (ohms) =

C.  Calculate DC Current for a Current Mirror Enter VCC:    Enter RC in ohms       Current (mA) =

D.  Calculate # of Turns To Obtain a Desired Inductance on a Ferrite Torroid Enter Inductance in millihenries:    Select Core:         Turns  =
The AL for this ferrite core is   =

E.  Calculate Cut off Frequency for an RC Low Pass Filter Enter resistor value in ohms:    Select capacitor values in uF        3 dB down frequency (Hertz)  =

F.  Calculate Power in dBm and mW from Peak to Peak Voltage Enter measured peak-to-peak voltage into a 50 ohm load:            dBm,     mW

Application Note: This web site follows the EMRFD standard for dBm power measurement. dBm = the power delivered into a 50 Ohm resistive load which is temporarily substituted at that point in the signal chain

G.  Calculate  Lm and Cm For a Crystal using the G3UUR Method ** Currently in beta test **
Enter frequency in MHz written on crystal (nominal frequency):

Enter measured frequency in MHz with switch open:  Enter measured frequency in MHz with switch thrown:

Enter crystal capacitance in pF:  Enter open switch circuit capacitance in pF

Cm   =    femto Farads ,  Lm  =   Henries

Supplemental web page for this applet: Crystal filter measurement and adjustment  Link

H.  Calculate Decibel Power Gain or Loss from 2  Pk-pk Voltages Enter voltage 1:    Enter voltage 2       dB gain or loss =

I.  Calculate Decibel Power Gain or Loss from Input and Output power Enter input power in watts:    Enter output power in watts       dB gain or loss =

J.  Calculate dBm and mW from RMS Voltage (50 ohms) Enter RMS voltage             dBm       mW

K. Calculate Return Loss and VSWR (50 Ohms Detector) Enter the detector signal in pk-pk volts when the unknown port is terminated in an open circuit:    Enter the detector signal in pk-pk volts when the unknown port is terminated in the unknown impedance:

Return loss =   dB,   VSWR=1: