You can drive 3 wire BLDC motors with RC ESC (Electronic Speed Controllers). Then, you can use standard servo signals to control their speed. Look it up, it's very easy using an arduino or other microcontroller. You can get ESCs and BLDC motors at hobby sites like HobbyKing.
If you are looking for a minimal circuit without microcontroller, you can probably come up with a logic circuit and some H driver chips that you could clock at different speeds. Sadly, the problem with BLDC motors is that getting them going is harder than you may think, because they can stop anywhere, and just energizing the turns makes it hard to predict which direction the motor will turn. You need to get it going, then sense the direction, then control the coils to get it moving properly. RC Controllers do this for you.
