The process is shown in FIG. 19. A keyboard S1-S32, is shown organized as a 4×8 matrix. The rows as strobed by signals ROW1*-ROW4* with the returning sense columns COL0-COL7 pulled to a logical 1 by resistors R1-R8, respectively. The resultant column data is read via the copie...
The TPS4022 device has 64 possible addresses (0 through 63 in decimal) that can be assigned by connecting resistors from the ADDR0 and ADDR1 pins to AGND. The device sets the address in the form of two octal (0-7) digits, one digit for each pin. The ADDR1 pin is the high-order ...
9) The provision of three infrared LEDs 1, 2 and 3 with no current-limiting resistors enables the device 10 to use maximum energy to create the infrared control pulses with a minimum amount of energy wasted. 10) The DO keys together with the numeral and letter keys allow a number of ...
On the left we see the two 0.5-ohm emitter resistors in series, so at idle the transistor exhibits a gm equal to 1A/V; but as the transistor leaves its class-A window of current conduction, the gm doubles to 2A/V. The required emitter voltage is equal to the diode's turn-on voltag...
The TPS4022 device has 64 possible addresses (0 through 63 in decimal) that can be assigned by connecting resistors from the ADDR0 and ADDR1 pins to AGND. The device sets the address in the form of two octal (0-7) digits, one digit for each pin. The ADDR1 pin is the high-order ...
The arm of the potentiometer 120 may be connected through a current limiting resistor 122 and a meter 124 to the arm of a potentiometer 126. The potentiometer 126 may be connected as part of a voltage dividing network comprising resistors 128 and 130 connected in series with the potentiometer ...
At this time current would flow from C-1 to C0 through the charge inductor L1. As described in the previous section, a calculator on the control board evaluates the voltage on C0 and the current flowing in L1 relative to a command voltage set point from the laser. Q1 opens when the ...
Additional safety circuits include a system power down indicator comprising amplifier 792, resistors R20, R21, R22, R23, R24, capacitor C5, and reference diode D1. These are connected to establish a high output on lead 794 whenever the +15 volt signal on input lead 796 and the +8 volt si...