Abstract: Embodiments of the present invention provide a motor-driven mechanical system with a detection system to measure properties of a back channel and derive oscillatory characteristics of the mechanical system. Uses of the detection system may include calculating the resonant frequency of the mechanical system and a threshold drive DTH required to move the mechanical system from the starting mechanical stop position. System manufacturers often do not know the resonant frequency and DTH of their mechanical systems precisely. Therefore, the calculation of the specific mechanical system's resonant frequency and DTH rather than depending on the manufacturer's expected values improves precision in the mechanical system use. The backchannel calculations may be used either to replace or to improve corresponding pre-programmed values.

Abstract: A drive signal for a motor-driven mechanical system has zero (or near zero) energy at an expected resonant frequency of the mechanical system. These techniques not only generate a drive signal with substantially no energy at the expected resonant frequency, they provide a zero-energy “notch” of sufficient width to tolerate systems in which the actual resonant frequency differs from the expected resonant frequencies.

Abstract: Embodiments of the present invention provide a motor-driven mechanical system with a detection system to measure properties of a back channel and derive oscillatory characteristics of the mechanical system. Uses of the detection system may include calculating the resonant frequency of the mechanical system and a threshold drive DTH required to move the mechanical system from the starting mechanical stop position. System manufacturers often do not know the resonant frequency and DTH of their mechanical systems precisely. Therefore, the calculation of the specific mechanical system's resonant frequency and DTH rather than depending on the manufacturer's expected values improves precision in the mechanical system use. The backchannel calculations may be used either to replace or to improve corresponding pre-programmed values.

Abstract: Embodiments of the present invention provide a motor-driven mechanical system with a detection system to measure properties of a back channel and derive oscillatory characteristics of the mechanical system. Uses of the detection system may include calculating the resonant frequency of the mechanical system and a threshold drive DTH required to move the mechanical system from the starting mechanical stop position. System manufacturers often do not know the resonant frequency and DTH of their mechanical systems precisely. Therefore, the calculation of the specific mechanical system's resonant frequency and DTH rather than depending on the manufacturer's expected values improves precision in the mechanical system use. The backchannel calculations may be used either to replace or to improve corresponding pre-programmed values.

Abstract: A drive signal for a motor-driven mechanical system has zero (or near zero) energy at an expected resonant frequency of the mechanical system. These techniques not only generate a drive signal with substantially no energy at the expected resonant frequency, they provide a zero-energy “notch” of sufficient width to tolerate systems in which the actual resonant frequency differs from the expected resonant frequencies.

Abstract: Embodiments of the present invention provide a motor-driven mechanical system with a detection system to measure properties of a back channel and derive oscillatory characteristics of the mechanical system. Uses of the detection system may include calculating the resonant frequency of the mechanical system and a threshold drive DTH required to move the mechanical system from the starting mechanical stop position. System manufacturers often do not know the resonant frequency and DTH of their mechanical systems precisely. Therefore, the calculation of the specific mechanical system's resonant frequency and DTH rather than depending on the manufacturer's expected values improves precision in the mechanical system use. The backchannel calculations may be used either to replace or to improve corresponding pre-programmed values.

Abstract: A drive signal for a motor-driven mechanical system has zero (or near zero) energy at an expected resonant frequency of the mechanical system. The drive signal may be provided in a series of steps according to a selected row of Pascal's triangle, wherein the number of steps equals the number of entries from the selected row of Pascal's triangle, each step has a step size corresponding to a respective entry of the selected row of Pascal's triangle, and the steps are spaced from each other according to a time constant determined by an expected resonant frequency of the mechanical system.

Abstract: A multi-channel integrated circuit comprises a plurality of channels (CH1 to CH20). A DAC (3) is provided in each channel (CH1 to CH20) for converting digital data inputted to the circuit (1) through an I/O port (14). Digital data to be converted by the DACs (3) is selectively applied to input registers (10) of each channel (CH1 to CH20) on a digital data bus (16) under the control of an interface and control logic circuit (15). The digital words written to the input registers (10) are in turn written to DAC registers (9) through corresponding digital switches (12) for conversion by the DACs (3). A clear code register (22) stores a clear code for writing to the DAC registers (9) in response to a clear signal applied to a clear terminal (24) of the circuit (1) so that analogue outputs appearing on output terminals (5) of the channels (CH1 to CH20) are of a predetermined value, typically, zero volts, when the circuit (1) is set in a clear condition.

Abstract: A multi-channel integrated circuit comprises a plurality of channels (CH1 to CH20). A DAC (3) is provided in each channel (CH1 to CH20) for converting digital data inputted to the circuit (1) through an I/O port (14). Digital data to be converted by the DACs (3) is selectively applied to input registers (10) of each channel (CH1 to CH20) on a digital data bus (16) under the control of an interface and control logic circuit (15). The digital words written to the input registers (10) are in turn written to DAC registers (9) through corresponding digital switches (12) for conversion by the DACs (3). A clear code register (22) stores a clear code for writing to the DAC registers (9) in response to a clear signal applied to a clear terminal (24) of the circuit (1) so that analogue outputs appearing on output terminals (5) of the channels (CH1 to CH20) are of a predetermined value, typically, zero volts, when the circuit (1) is set in a clear condition.