초록 ▼

In the invention, an integrator integrates a current indicative of an input signal to generate at its output end a voltage (referred to as integral output voltage) by means of a condenser. At a point in time when the integral output voltage has reached a predetermined level, or at a point in time de

In the invention, an integrator integrates a current indicative of an input signal to generate at its output end a voltage (referred to as integral output voltage) by means of a condenser. At a point in time when the integral output voltage has reached a predetermined level, or at a point in time determined by timing of a predetermined period, the integral output voltage is reduced in absolute value by flowing into or out of the condenser a constant current supplied by a constant current source. The direction of the constant current depends on the polarity of the output of the integrator. A counter counting up or down clocks stops counting while the constant current is flowing. This permits use of a low-frequency A/D converter to convert the input signal at a reduced power and extend the dynamic range of the A/D converter.

대표청구항 ▼

In the invention, an integrator integrates a current indicative of an input signal to generate at its output end a voltage (referred to as integral output voltage) by means of a condenser. At a point in time when the integral output voltage has reached a predetermined level, or at a point in time de

In the invention, an integrator integrates a current indicative of an input signal to generate at its output end a voltage (referred to as integral output voltage) by means of a condenser. At a point in time when the integral output voltage has reached a predetermined level, or at a point in time determined by timing of a predetermined period, the integral output voltage is reduced in absolute value by flowing into or out of the condenser a constant current supplied by a constant current source. The direction of the constant current depends on the polarity of the output of the integrator. A counter counting up or down clocks stops counting while the constant current is flowing. This permits use of a low-frequency A/D converter to convert the input signal at a reduced power and extend the dynamic range of the A/D converter. ointed-to token, replacing said copy pointer with the pointed-to token. 4. A method as in claim 3, further comprising: replacing said pointed-to token with data corresponding to the pointed-to token; and passing said corresponding data to an output. 5. An apparatus for decompressing three or more bytes per processor cycle from a stream of compressed data using a processing pipeline, wherein said compressed data is represented by tokens of varying and unknown length, the apparatus comprising: first logic for accepting as input said stream, wherein said stream comprises token data; second logic for partially decoding a token from said token data to determine a boundary position of said token; and third logic for priming said processing pipeline with said token and a length marker indicating said boundary position. 6. An apparatus as in claim 5, further comprising: fourth logic for determining if any token in said processing pipeline represents literal data and if any token in said processing pipeline represents a copy pointer; fifth logic, responsive to said fourth logic, for marking each token with a marker, said marker indicating which of literal data and copy pointer is represented; and sixth logic for passing literal data from any of said tokens marked as representing literal data directly to an output device. 7. An apparatus as in claim 6, further comprising: seventh logic for determining if any of said tokens marked as representing a copy pointer has a copy pointer pointing into said tokens in said processing pipeline at a pointed-to token; and eighth logic, responsive to a determination that a copy pointer is pointing into said tokens in said processing pipeline at a pointed-to token, for replacing said copy pointer with the pointed-to token. 8. An apparatus as in claim 7, further comprising: ninth logic for replacing said pointed-to token with data corresponding to the pointed-to token; and tenth logic for passing said corresponding data to an output device. 9. An apparatus as in claim 6, wherein any one or more of said fourth through said sixth logic processors comprise at least one processor component. 10. An apparatus as in claim 9, wherein said at least one of said processor components comprise at least one application specific integrated circuit. 11. An apparatus as in claim 5, wherein any one or more of said first through said third logic comprise at least one processor component. 12. An apparatus as in claim 11, wherein said at least one of said processor components comprise at least one application specific integrated circuit. 13. A computer readable storage medium comprising a computer program product for decompressing three or more bytes per processor cycle from a stream of compressed data, wherein said compressed data is represented by tokens of varying and unknown length, comprising computer readable program code for causing a computer to: input said stream, comprising token data; partially decode a token from said token data to determine a boundary position of said token; and initiate a processing pipeline with said token and a length marker for indicating said determined boundary position. 14. A computer readable storage medium as in claim 13, where said computer readable program code further causes the computer to: determine if any token in said processing pipeline represents literal data, and if any token in said processing pipeline represents a copy pointer; responsive to the determination, marking each such token with a marker, said marker indicating which of literal data and copy pointer is represented; and passing literal data from any of said tokens marked as representing literal data directly to an output. 15. A computer readable storage medium as in claim 14, where said computer readable program code further causes the computer to: determine if any of said tokens marked as representing a copy pointer has a copy pointer pointing into said tokens in