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• Resistors, which are used to control the current and voltage in the circuit.
• Transistors, which are acting as electronic switches to control the motor direction.
• Diodes, which prevent back current flow when the motor inductive load is switched off.

• Four N-Channel MOSFETS( Q1, Q2, Q3, and Q4) - two each from two different manufacturers (Alpha & Omega Semiconductor Inc. and HUASHUO).
• Four Schottky Diodes (D1, D2, D3, and D4) from STMicroelectronics.
• Numerous Resistors of values 1k ohms (R1, R3, R5, R7) and 50k ohms (R2, R4, R6, R8).

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• Transistors (Q1, Q2, Q3, Q4): These act as switches. In your design, there are both P-channel (AO3401A) and N-channel (AO3400A) MOSFETs indicating a typical H-bridge configuration. The P-channel MOSFETs are typically on the high side (connected to VIN) and the N-channel MOSFETs are on the low side (connected towards GND).
• Diodes (D1, D2, D3, D4): The BAT60JFILM diodes are used for flyback protection, protecting the circuit from voltage spikes generated by the inductive load (the motor) when the current flow is suddenly changed or interrupted.
• Resistors (R1, R2, R3, R4, R5, R6, R7, R8): These resistors are likely used for pulling the gate of MOSFETs to a defined logic level (high or low) in order to turn them on or off. They can also be used for current sensing if part of a measurement circuit was outlined.
• Input Nets (INPUT_A, INPUT_A', INPUT_B, INPUT_B'): These input nets are probably used to control the operation of the H-bridge. Depending on how these inputs are driven, they determine which pair of transistors is turned on, thus controlling the motor direction.
• Power Nets (VIN): This is the positive voltage supply for the motor and possibly the H-bridge itself, depending on the circuit.
• Motor Outputs (MOTOR+, MOTOR-): These are the outputs that connect to the motor, where the direction of the motor is controlled by reversing the polarity of the connection to these outputs.

• To rotate the motor in one direction, one pair of diagonally opposite transistors (e.g., Q1 and Q4) is turned on, allowing current to flow through the motor in one direction.
• To reverse the motor, the other pair of diagonally opposite transistors (e.g., Q2 and Q3) is turned on, reversing the current flow through the motor.
• The resistors connected to the gate of the MOSFETs ensure that the transistors are properly turned off when not in use and help in defining the switching logic level.
• The diodes across the MOSFETs are critical for dissipating the energy from the motor's inductive kickback, protecting the transistors from voltage spikes.

• The control logic for which transistors to turn on/off is determined by the input signals (INPUT_A, INPUT_A', INPUT_B, INPUT_B'). The exact logic would depend on how these inputs are driven but effectively will involve setting one input high and the other low for one rotation direction and inverting those signals for the other direction.