# US 2014/0152481 A1 · Integrated circuit device and method of dynamically modifying at least one characteristic within a digital to analogue converter module > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0152481 A1 - Document ID: US20140152481A1 - Status: Published application - Kind: A1 - Application number: 14/233,762 - Filed: 2011-07-20 - Published: 2014-06-05 - Earliest claimed: 2011-07-20 - Assignees: Freescale Semiconductor, Inc. - Inventors: Stephane Dugalleix; Birama Goumballa; Gilles Montoriol - Web page: https://patentgrep.com/patent/US20140152481A1 ## CPC - H03M 1/06: Continuously compensating for, or preventing, undesired influence of physical parameters (periodically, {e.g. by using stored correction values,} H03M1/10) - H03M 1/0626: {by filtering} - H03M 1/0863: {of switching transients, e.g. glitches} - H03M 1/745: {with weighted currents} - H03M: CODING; DECODING; CODE CONVERSION IN GENERAL (using fluidic means F15C4/00; optical analogue/digital converters G02F7/00; coding, decoding or code conversion, specially adapted for particular applications, see the relevant subclasses, e.g. G01D, G01R, G06F, G06T, G09G, G10L, G11B, G11C, H04B, H04L, H04M, H04N; ciphering or deciphering for cryptography or other purposes involving the need for secrecy G09C) ## Abstract An integrated circuit device comprises at least one digital to analogue converter module. The DAC module includes at least one current replicator component having a first channel terminal, a second channel terminal and a reference voltage terminal arranged to receive a reference voltage signal; the at least one current replicator component being arranged to moderate a current flowing between the first and second channel terminals based at least partly on the received reference voltage signal. The DAC module also includes at least one filter component coupled to the reference voltage terminal to perform filtering of the reference voltage signal. ## Claims ### Claim 1 An integrated circuit device comprising at least one digital to analogue converter module; the at least one DAC module comprising: at least one current replicator component comprising a first channel terminal, a second channel terminal, and a reference voltage terminal arranged to receive a reference voltage signal, wherein the at least one current replicator component is arranged to moderate a current flowing between the first and second channel terminals based at least partly on the received reference voltage signal; and at least one filter component operably coupled to the reference voltage terminal of the at least one current replicator component and arranged to perform filtering of the reference voltage signal; and at least one filter control module, wherein the at least one filter control module is arranged to: detect a state change of a digital input of the at least one DAC module; and dynamically modify at least one characteristic of the at least one filter component in response to detecting said stage change. ### Claim 2 (depends on 1) The integrated circuit device of claim 1 wherein the filter control module is arranged to detect at least one edge within at least one bit signal of said digital signal. ### Claim 3 (depends on 1, 2) The integrated circuit device of claim 1 claim 2, wherein said at least one filter control module causes the filter component to operate in a transition mode when dynamically modifying at least one characteristic of the at least one filter component. ### Claim 4 (depends on 1) The integrated circuit device of claim 1 wherein the at least one filter control module is further arranged to cause the filter component to operate in a stable state mode when said state change is not detected. ### Claim 5 (depends on 1) The integrated circuit device of claim 1 wherein the at least one filter control module is arranged to dynamically reduce a time constant of the at least one filter component upon detection of said state change. ### Claim 6 (depends on 4) The integrated circuit device of claim 4 wherein the at least one filter component comprises a series resistance capacitance filter, and the at least one filter control module is arranged to dynamically reduce a series resistance characteristic of the at least one filter component upon detection of said state change. ### Claim 7 (depends on 6) The integrated circuit device of claim 6 wherein the at least one filter component comprises at least one controllable switching element operably coupled in parallel with at least one series resistance element of the at least one filter component. ### Claim 8 (depends on 7) The integrated circuit device of claim 7 wherein the at least one controllable switching element is arranged to selectively create a reduced resistance circuit across the at least one series resistance element in accordance with at least one control signal output by the at least one filter control module. ### Claim 9 (depends on 1) The integrated circuit device of claim 1 wherein the at least one filter control module comprises a plurality of edge detector components, each edge detector component being arranged to detect at least one edge within at least one bit signal of the digital input of the DAC module. ### Claim 10 (depends on 9) The integrated circuit device of claim 9 wherein the at least one filter control module is arranged to dynamically modify at least one characteristic of the at least one filter component upon detection of at least one edge within at least one bit signal by at least one of the edge detector components. ### Claim 11 (depends on 10) The integrated circuit device of claim 10 wherein a number of the plurality of edge detector components are arranged to output an edge detection signal comprising an indication of whether an edge has been detected within the respective bit signal; and the at least one filter control module further comprises at least one of an OR gate and a NOR gate, the at least one OR gate and NOR gate being arranged to receive the indication output by the number of edge detector components and to output a control signal. ### Claim 12 (depends on 11) The integrated circuit device of claim 11 wherein the at least one OR gate and NOR gate outputs a control signal that dynamically modifies at least one characteristic of the at least one filter component upon at least one edge detector component outputting an indication of an edge being detected within at least one bit signal. ### Claim 13 (depends on 11) The integrated circuit device of claim 11 wherein a number of the edge detector components is/are arranged to output an edge detection signal comprising an indication of whether an edge has been detected within the respective bit signal; and wherein the at least one filter control module is arranged to output a plurality of control signals comprising the edge detection signals to weightedly modify at least one characteristic of the at least one filter component upon detection of at least one edge within at least one bit signal by at least one of the plurality of edge detector components. ### Claim 14 (depends on 1) The integrated circuit device of claim 1 wherein the at least one DAC module further comprises at least one current reference component comprising a first channel terminal, a second channel terminal and a reference voltage terminal. ### Claim 15 (depends on 14) The integrated circuit device of claim 14 wherein the at least one current reference component is arranged to generate the reference voltage signal at the reference voltage terminal thereof based at least partly on a reference current flowing between the first and second channel terminals thereof. ### Claim 16 (depends on 14) The integrated circuit device of claim 14 of wherein the at least one filter component is operably coupled between the reference voltage terminal of the at least one current reference component and the reference voltage terminal of the at least one current replicator component. ### Claim 17 (depends on 1) The integrated circuit device of claim 1 wherein the DAC module comprises a current steering DAC for controlling a biasing current within a radio frequency device. ### Claim 18 A digital to analogue converter module comprising: at least one current replicator component comprising a first channel terminal, a second channel terminal and a reference voltage terminal arranged to receive a reference voltage signal, wherein; the at least one current replicator component is arranged to moderate a current flowing between the first and second channel terminals based at least partly on the received reference voltage signal; and at least one filter component operably coupled to the reference voltage terminal of the at least one current replicator component and arranged to perform filtering of the reference voltage signal; and at least one filter control module arranged to: detect a state change of a digital input of the at least one DAC module; and dynamically modify at least one characteristic of the at least one filter component. ### Claim 19 A method of dynamically modifying at least one filter characteristic within a digital to analogue converter (DAC) module, the method comprising: receiving a digital input signal of the DAC module; detecting edges within at least one bit signal of the received digital input signal of the DAC module; and dynamically modifying at least one characteristic of at least one filter component of the DAC module upon detection of a state change of the received digital input signal of the DAC module. ### Claim 20 (canceled)