Abstract: A thermal head drive circuit drives M number of thermal heads for printing one line and includes a delay unit that applies different time delays to M bits of print data to be supplied to the corresponding M thermal heads. The higher order the odd number thermal heads of the M thermal heads are, the greater are the time delays applied to the corresponding bits of the print data, while the higher order the even number thermal heads of the M thermal heads are, the less are the time delays applied to the corresponding bits of the print data.

Abstract: A thermal head drive circuit drives M number of thermal heads for printing one line and includes a delay unit that applies different time delays to M bits of print data to be supplied to the corresponding M thermal heads. The higher order the odd number thermal heads of the M thermal heads are, the greater are the time delays applied to the corresponding bits of the print data, while the higher order the even number thermal heads of the M thermal heads are, the less are the time delays applied to the corresponding bits of the print data.

Abstract: A disclosed thermal head driving circuit includes an inverter type drive circuit including a p-channel MOS transistor and a first n-channel MOS transistor, and configured to have a driving signal of a rectangular wave provided at gates of the p-channel MOS transistor and the first n-channel MOS transistor to invert the driving signal; a power MOS transistor configured to have provided, at its gate, the inverted drive signal output from the inverter type drive circuit to drive a thermal head connected to its drain; a first resistance connected between a drain of the p-channel MOS transistor and a drain of the first n-channel MOS transistor; and a second resistance connected between a junction point between the first resistance and the drain of the first n-channel MOS transistor, and the gate of the power MOS transistor.

Abstract: A motor drive circuit includes a first transistor. The collector of a second transistor is connected to the emitter of the first transistor in series. A motor is connected to a connection point between the first and second transistors. A first brake control circuit turns off the first transistor and turns on the second transistor in accordance with a brake operation instruction signal. A second brake control circuit forces the first transistor to be turned OFF in accordance with the brake operation instruction signal independently from the first brake control circuit.

Abstract: A current control circuit includes a control current generation circuit that generates a control current in accordance with an external current control signal. A plurality of drive current generation circuits generate drive currents in accordance with the control current that is generated by and supplied from the control current generation circuit.

Abstract: A motor drive circuit includes a first transistor. The collector of a second transistor is connected to the emitter of the first transistor in series. A motor is connected to a connection point between the first and second transistors. A first brake control circuit turns off the first transistor and turns on the second transistor in accordance with a brake operation instruction signal. A second brake control circuit forces the first transistor to be turned OFF in accordance with the brake operation instruction signal independently from the first brake control circuit.

Abstract: A current control circuit includes a control current generation circuit that generates a control current in accordance with an external current control signal. A plurality of drive current generation circuits generate drive currents in accordance with the control current that is generated by and supplied from the control current generation circuit.

Abstract: An error amplifier stage (32) is supplied with an input signal from an input terminal (Vin) and a feedback signal produced by an output current/voltage converter stage (34) and amplifies the input signal with reference to the feedback signal to produce an amplified current signal which is delivered to a load driver stage (33). The error amplifier stage comprises an operational amplifier (6) of a voltage-controlled current-output type which is a transconductance amplifier having a transconductance gm. The transconductance amplifier includes a constant-current source and serves as a differential amplifying circuit based on the transconductance gm. A phase adjusting circuit for the transconductance amplifier is formed by a combination of a resistor (R10) and a capacitor (C10) connected in series between an output terminal of the transconductance amplifier and a ground potential.

Abstract: A motor driving circuit controls driving currents to be supplied to stator coils of a plurality of phases so as to supply the driving currents to the stator coils in sequence so as to generate a rotating magnetic field. The interaction between the rotating magnetic field generated by the stator coils and a magnetic field generated by a magnet of a rotor causes the rotor to rotate with respect to the stator coils. The motor driving circuit includes a driving circuit for supplying the driving currents to the stator coils, respectively; and a preventing circuit for preventing the driving means from supplying the driving currents to the stator coils in sequence.