Abstract:
An adaptive video disc record stylus kicker system for inducing limited stylus translations radially across the disc record. Control circuitry responsive to disc track and disc angular sector identification signals automatically calibrates the kicker activation signals to produce a desired kicker induced stylus translation. A microprocessor establishes a table containing kicker control signals for driving the kicker in each sector of the disc. For a given kicker induced stylus translation, the error is calculated between the actual stylus translation and the programmed stylus translation and the control signal for the respective sector is adjusted accordingly. Subsequently the control signals for each of the other sectors are altered proportional to the adjustment made to the particular control signal in accordance with a correlation function.
Abstract:
User control apparatus for controlled systems includes a touch sensitive capacitive network for changing the amplitude of an alternating signal when contacted by a user and a control unit for controlling a predetermined function of the controlled system in response to a control signal representing amplitude changes of the alternating signal. A diode is connected in series between the touch sensitive capacitive network and wiring for connecting the touch sensitive capacitive network to the control unit. A filter capacitor is connected in shunt with the diode. The diode is poled to charge the filter capacitor to the peak amplitude of a predetermined portion of the alternating signal and also isolates the touch sensitive network from the capacitance of the filter capacitor and any stray capacitance associated with the wiring which may adversely affect the sensitivity of the touch sensitive capacitive network. When utilized in a television receiver, the alternating signals advantageously comprise pulses generated during deflection retrace intervals when the receiver's electron beams are normally blanked to reduce the visible effects of signals radiated from wiring between the source of alternating signals and the touch sensitive capacitive network.
Abstract:
A tuning system having a display unit displaying the channel number of a channel selected by a user in response to display information includes eight binary signals partitioned into first and second groups each of four binary signals arranged in BCD (Binary Coded Decimal) format representing the tens and units digits, respectively, of the channel number, includes a memory for storing seven binary signals partitioned into a third group of three binary signals and a fourth group of four binary signals also representing the tens and units digits, respectively, of the channel number. The third group consists of the three least significant binary signals of the first group. The fourth group consists of four binary signals having the same states as the state of the four binary signals, respectively, of the second group when the tens digit of the channel number is less than eight and otherwise having the complementary states of the states of the four binary signals, respectively, of the second group. Encoder and decoder circuits are provided for converting between the first and second groups and the third and fourth groups, respectively.