초록 ▼

A touch responsive power control system in which the majority of the signal processing functions are achieved through digital circuitry and includes a controllable pulse generator responsive to the change in capacitance caused by a human touch at a touch sensitive control point of the device to be r

A touch responsive power control system in which the majority of the signal processing functions are achieved through digital circuitry and includes a controllable pulse generator responsive to the change in capacitance caused by a human touch at a touch sensitive control point of the device to be regulated. The magnitude of the change in capacitance caused by the human touch is encoded in the form of the number of pulses contained in a pulse train or a series of pulse trains over a selected time period. The number of pulses is counted and digitally compared with a stored count. If the present count is different from the stored count, the stored count is adjusted and an error signal proportional to the difference between counts is supplied, after a sufficient interval, to a load driver which adjusts the power level supplied to the load from an electrical power source.

대표청구항 ▼

A touch responsive power control system comprising: circuit means having a control input producing a capacitive change responsive to human touch; means responsive to said capacitive change for generating a digital pulse train, the number of pulses in said pulse train in a selected time period being

A touch responsive power control system comprising: circuit means having a control input producing a capacitive change responsive to human touch; means responsive to said capacitive change for generating a digital pulse train, the number of pulses in said pulse train in a selected time period being a function of the magnitude of said capacitive change; digital circuit means for counting the number of pulses in said pulse train in said selected time period to generate a present count; digital storage means for storing a selected reference count; digital comparator means for comparing said present count with said reference count and to generate an error signal responsive to a difference between said present count and said reference count; means for generating a corrective signal responsive to said error signal; means for updating said reference count in a direction selected to make said reference count equal to said present count; load driver means adjustable to control the power level from a power source to a load at a selected power level; and means for connecting said corrective signal to said load driver means to adjust the selected power level in response to said corrective signal.