That's not how the Gemini H bridge drive works....its PWM....both motor poles are held high (at input voltage aka 12V-18VDC) one pole pulses low at a preset freq (the pulse width is determined by the system...which is to the motor, an avg DC offset, it drives.? It Not only drives it move it does so with good torque due to the drive system PWM design.
The H bridge does have ceramic capacitors on each output and a large electro on its Vin drive power close by (There is another at pwr in).?? The H bridge It is laid out exactly to the design specs of the ICs mfgr.
Any large filter on the motor drive lines will distort the motor power factor.?? This design is basically the same or similar to that in the Gemini 1....just using newer ICs....aka a dual G bridge in SO20 package.
It works there is nothing wrong with the design
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Brendan
