Cypress Semiconductor Corporation

Joseph D Stenger

Mark R Gehring

Brent R Jensen

Russell R Moen

Eric P Mitchell

An improved Received Signal Strength Indicator (RSSI) circuit and method is provided herein for quickly and accurately detecting the strength of a received signal. The circuit described herein provides a more accurate RSSI signal, while consuming less power and die area, by utilizing digital rather than analog summing.

Digital received signal strength indicator (RSSI) circuit and method for detecting the strength of a received signal

Systems and method for tracking different types of transconductance cells is shown and described. In these multi-cell systems, the addition of one or more tracking control modules allows circuit designers to advantageously incorporate multiple transconductor topologies and their uniquely beneficial characteristics into their designs, without eradicating its centralized multi-cell tuning functionality.

Circuit for creating tracking transconductors of different types

A crystal oscillator circuit which does not produce runt pulses when the oscillator is turned on or off. The circuit includes a crystal oscillator, an integrator which integrates the energy in a plurality of pulses, a threshold circuit which is active when the output of the integrator reaches a pre-specified threshold and gating circuits which gate the output of the crystal oscillator to the output terminal only when the threshold circuit has reached the specified threshold.

Circuit and method to eliminate startup and shutoff runt pulses from crystal oscillators

A system and method of testing switch functionality of a tunable capacitor array is disclosed. A built in test (BIT) circuit provides digital device for testing the functionality of a programmable switch capacitor array circuit. The method and system provides for switching a capacitor switch of a switch capacitor array between on and off, switching a test enable switch of a BIT circuit between on and off, pulling an internal node of the BIT circuit either high or low using a current source, and determining whether the internal node has been pulled either high or low. In addition, the method and system provides for making a pass or fail determination based on a determined state of the internal node.

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North Plains, OR, United States of America

Joseph D Stenger