Abstract: A spread spectrum clock signal generator and an accompanying method provide a spread spectrum clock signal of a reduced electromagnetic interference. The spread spectrum clock signal generator includes (a) a state machine, which maintains a current state of the spread spectrum clock signal generator, receives as input value a next state of the spread spectrum clock signal generator and generates a clock phase selection signal based on the current and next states; (b) a random number generator for generating the next state; and (c) a waveform generation circuit for generating a spread spectrum clock signal based on the clock phase selection signal.

Abstract: A method provides a bidirectional communication protocol for data communication between a first device and a second device. The method includes: during a first time interval, transmitting data from the first device to the second device; and during a second time interval, (a) after the occurrence of a first event, (i) suspending data transmission from the first device to the second device; and (ii) transmitting control data from the second device to the first device; and (b) after the occurrence of a second event, transmitting control data from the first device to the second device.

Abstract: A dual slope analog-to-digital converter with automatic short cycle range determination. The time period of the signal integrate phase is adjusted to accommodate different ranges of input signals. Range selection is achieved automatically with the converter switching quickly from one range to another until the right range is found, without the necessity of displaying an "out of range" reading. Normal mode rejection of 60 Hz noise is achieved on all timing ranges.

Abstract: A digitally switched analog signal conditioner comprising a plurality of pairs of input terminals, a junction, and an output terminal; a plurality of capacitors, first ends of the capacitors being connected to the junction; a plurality of switches being arranged in pairs, first ends of each pair being connected to the other ends of different ones of the capacitors, the other ends of each pair being connected to respective ones of a pair of input terminals, the switches of each pair being adapted to be operated alternatively; an amplifier having an input and an output, the input being operatively coupled to the junction; and a sample and hold circuit operatively coupled to the output of the amplifier for periodically sampling and holding the output, the output of the sampling and holding circuit being connected to one of the input terminals of one of the pairs of input terminals, the other of the terminals of the one pair of input terminals being connected to a point of reference potential.