Voltage controlled switching element gate drive circuit

An apparatus comprising:

• a first switching element;
• a second switching element coupled to the first switching element;
• a first adjustable-resistance device coupled between the first switching element and a first terminal of a voltage source;
• a second adjustable-resistance device coupled between the second switching element and a second terminal of the voltage source;
• and
• a control device configured to adjust a first resistance value corresponding to the first adjustable-resistance device, and a second resistance value corresponding to the second adjustable-resistance device;
• wherein at least one of the first adjustable-resistance device or the second adjustable-resistance device includes a constant-value resistance coupled to a variable-current source;
• and
• wherein the variable current source includes a second constant-value resistance and an output device configured to cause a variable current corresponding to a ratio of a reference voltage received from the control device and a value of the second constant-value resistance to flow in the first constant-value resistance.