MediaTek MT1688E DVD-ROM/CD-RW Drive Controller Partial Circuit Analysis

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1 October 13, 2005 MediaTek MT1688E DVD-ROM/CD-RW Drive Controller Partial Circuit Analysis Table of Contents Introduction... Page 1 List of Figures... Page 2 Device Summary Sheet... Page 19 Top Level Diagram...Tab 1 Main Input Signal Path I...Tab 2 Main Input Signal Path II...Tab 3 Main Input Signal Path III...Tab 4 Main Input Signal Path IV...Tab 5 Voltage Generators...Tab 6 Test Circuitry...Tab 7 Signal Naming Conventions and Symbol Definitions...Tab 8 Signal Cross-Reference List...Tab 9 Report Evaluation...Tab 10 For comments, questions, or more information about this report, or for any additional technical needs concerning semiconductor technology, please call Sales at Chipworks Richmond Road, Suite 500, Ottawa, ON K2H 5B7, Canada Tel: Fax:

2 Some of the information in this report may be covered by patents, mask and/or copyright protection. This report should not be taken as an inducement to infringe on these rights Chipworks Incorporated This report is provided exclusively for the use of the purchasing organization. It can be freely copied and distributed within the purchasing organization, conditional upon the accompanying Chipworks accreditation remaining attached. Distribution of the entire report outside of the purchasing organization is strictly forbidden. The use of portions of the document for the support of the purchasing organization's corporate interest (e.g., licensing or marketing activities) is permitted, as defined by the fair use provisions of the copyright act. Accreditation to Chipworks must be attached to any portion of the reproduced information.

3 MediaTek MT1688E DVD-ROM/CD-RW Drive Controller Page 2 List of Figures Package Markings Die Markings Package X-Ray Die Photograph Die Architecture Operational Amplifier 1A Definition Operational Amplifier 1B Definition Operational Amplifier 1C Definition Operational Amplifier 1D Definition Operational Amplifier 1E Definition Operational Amplifier 2A Definition Operational Amplifier 3A Definition Operational Amplifier 3B Definition Operational Amplifier 3C Definition Operational Amplifier 3D Definition Operational Amplifier 3E Definition Operational Amplifier 4A Definition Operational Amplifier 4B Definition Operational Amplifier 4C Definition Operational Amplifier 5A Definition Operational Amplifier 5B Definition Comparator Definition Differential Amplifier Definition Bias Generator 1A Definition Bias Generator 2A Definition Bias Generator 2B Definition Bias Generator 2C Definition Bias Generator 2D Definition Bias Generator 2E Definition Bias Generator 3A Definition Bias Generator 3B Definition

4 MediaTek MT1688E DVD-ROM/CD-RW Drive Controller Page D Flip-Flop Definitions Top Level Diagram Variable Voltage Divider Variable Voltage Divider to 1 Multiplexer Main Input Signal Path I Input Switches and Differentiators Input Multiplexer Input Switch I Input Differentiators Variable Resistor Bit Control Decoder Local Unused Elements Variable Voltage Divider Bit Control Decoder Input Switch II Switch Pair Reference Voltage Followers Reference Voltage Follower I Reference Voltage Follower II Bias Current Sources Input Control Logic Signal Adder/Multiplier Analog Adder/Multiplier Transconductance Pair I Variable Resistor I Transconductance Pair II Variable Resistor II Bit Control Decoder Active Load and CMFB

5 MediaTek MT1688E DVD-ROM/CD-RW Drive Controller Page FC Amplifier I FC Amplifier II Main Input Factor Generator Variable Current Source Voltage Comparator Factor Voltage Generator Reference Voltage Generator Bias/Reference Generators Bias Generator I Bias Generator II Reference Voltage Generator Bias Generator III Four-Channel Filter Input Amplifier Gyrator Filter Feedback Amplifier I Feedback Amplifier II A/D Waveform Converter Transconductance Pair 1D Transconductance Pair 1E Transconductance Pair 1G Transconductance Pair 1J Transconductance Pair 1M Transconductance Pair 3A Transconductance Pair 4B Transconductance Pair 4C Transconductance Pair 5B Common Mode Feedback 1B Common Mode Feedback 1C Variable Capacitors Bias Generator Tuning Voltage Switch

6 MediaTek MT1688E DVD-ROM/CD-RW Drive Controller Page Four-Stage Filter Input Stage Gyrator Filter Stage I Gyrator Filter Stage II Gyrator Filter Stage III Gyrator Filter Stage IV Transconductance Pair 1B Transconductance Pair 1C Transconductance Pair 1F Transconductance Pair 1H Transconductance Pair 1J Transconductance Pair 1K Transconductance Pair 1L Transconductance Pair 1M Transconductance Pair 1N Transconductance Pair 3A Transconductance Pair 4A Transconductance Pair 4C Transconductance Pair 5A Transconductance Pair 5C Output Follower Common Mode Feedback 1A Common Mode Feedback 1B Common Mode Feedback 1C Variable Capacitors Bias Generator Adjustable FC Amplifier Adjustable Size PMOS I Adjustable Size PMOS II Adjustable Size Load I Adjustable Size Load II Common Mode Feedback

7 MediaTek MT1688E DVD-ROM/CD-RW Drive Controller Page Voltage Swing Detector Reference Voltage Generator Voltage Divider Voltage Swing Comparator Out-of-Range Detector A/D Waveform Converter Tuning Voltage Switch Bias Generator Reference Filter Gyrator Filter A/D Waveform Converter Tuning Voltage Switch Transconductance Pair 1A Transconductance Pair 1J Transconductance Pair 1L Transconductance Pair 2A Common Mode Feedback 1C Variable Capacitors Bias Generator Filter Tuning DAC R-2R Ladder Output Selectors and Pullups Output Selector I Output Selector II Output Select Decoder Phase Detectors and Charge Pumps Phase/Frequency Detectors Input Selector Phase/Frequency Detector I Over-180 Shift Detector Pulse Counter Clock Cycle Counter I

8 MediaTek MT1688E DVD-ROM/CD-RW Drive Controller Page Clock Cycle Counter II Variable Delay Register Phase/Frequency Detector II Output Buffer Control Logic Pulse Splitter Charge Pump Variable Capacitor Bit Current-Type DAC Predecoder I Predecoder II Decoder I Decoder II Decoder III Controlled Current Source Bias Generator Output Buffer Control Logic Variable Gain Amplifier Variable Voltage Divider Three-Phase Controller Voltage Converter Open N-Type Drain Follower I Open P-Type Drain Follower I Open P-Type Drain Follower II Open N-Type Drain Follower II Current Switch I Current Switch II Voltage Multiplexer Summing Differential Amplifier Variable Capacitor Differential VGA I

9 MediaTek MT1688E DVD-ROM/CD-RW Drive Controller Page Variable Resistor I Variable Resistor II Differential VGA II Variable Current Source Variable Resistor I Variable Resistor II Gain Control Decoder Control Logic Bias Generator :5 Multiplexer Window Comparator Reference Voltage Generator Variable Current Source Voltage Comparator I Voltage Comparator II Three-Phase Switching Bridge Bias Voltage Generator Controlled Current Source I Variable Current Source 1A Variable Current Source 2A Variable Current Source 1B Variable Current Source 2B Controlled Current Source II Variable Current Source 3A Variable Current Source 4A Variable Current Source 3B Variable Current Source 4B A/D Waveform Converter Variable Capacitors Bias Generator Bias Generator I Bias Current Sources

10 MediaTek MT1688E DVD-ROM/CD-RW Drive Controller Page Bias Generator II Control Circuitry Control Signal Driver Control Logic Bias/Reference Generator Bias Voltage Generators Bias Current Sources I Bias Current Sources II Bias Current Sources III Bias Current Sources IV Bias Current Sources V Bias Current Sources VI Reference Voltage Divider Main Input Signal Path II Summing Stage OTA Input Switch Transconductance Amplifier Variable Resistor Output Amplifier Variable Current Source I Variable Current Source II Variable Capacitor Reference Voltage Follower OTA Input Control Bias Generator Control Buffers Amplifiers Amplifier I Amplifier Stage I Amplifier Stage II Low-Pass Filter

11 MediaTek MT1688E DVD-ROM/CD-RW Drive Controller Page AGC Circuit I AGC Circuit II Reference Voltage Generator Bias Voltage Generator Amplifier II Amplifier Bias Generator I Bias Generator II Active Filters Active RC Filter Variable Resistor I Variable Resistor II Filter Tuning Decoder Switched-Capacitor Filter Variable Capacitor Clock Splitter CFC Amplifier Output Stage Amplifier Amplifier Stage I Amplifier Stage II Low-Pass Filter AGC Circuit I AGC Circuit II Reference Voltage Generator Bias Voltage Generator Voltage Comparator Controlled Load Test Point Selector Reference/Bias Generators Bias Voltage Generator Bias Current Sources I

12 MediaTek MT1688E DVD-ROM/CD-RW Drive Controller Page Bias Current Sources II Bias Current Sources III Reference Voltage Follower Main Input Signal Path III Summing OTA OTA Input Switch OTA Reference Switch Transconductance Amplifier Programmable Resistor Programmable Current Source I Programmable Current Source II Programmable Current Source III OTA Input Control Amplifier I Programmable Current Sources Programmable Capacitor Control Logic Voltage Comparator Programmable Voltage Divider Programmable Load Reference Voltage Follower Amplifier II Input Adder Amplifier II Programmable Current Source I Programmable Current Source II Voltage Followers CFC Amplifier Output Source Follower Bias/Reference Generators Master Bias Generator I Master Bias Generator II

13 MediaTek MT1688E DVD-ROM/CD-RW Drive Controller Page Bias Generator I Bias Current Sources Bias Generator II Main Input Signal Path IV Variable Gain Amplifiers Programmable Voltage Divider Control Decoder Analog Conversion Circuit Differential Summing Amplifier Switch I Controlled Current Source Programmable Voltage Divider Switch II Variable Gain Amplifier I Programmable Voltage Divider Control Decoder Voltage Adder I Controlled Current Source Decoder Variable Resistor Variable Gain Amplifier II Variable Voltage Divider Variable Voltage Divider Controlled Current Source Decoder Voltage Adder II Variable Resistor Variable Gain Amplifier III Variable Voltage Divider Controlled Current Source Decoder

14 MediaTek MT1688E DVD-ROM/CD-RW Drive Controller Page Signal Conversion Block I Differential Summing Amplifier Switch Controlled Current Source Programmable Voltage Divider Control Predecoder Variable Gain Amplifier Programmable Voltage Divider Control Decoder Controlled Function Amplifier Variable Gain Amplifier Variable Voltage Divider Variable Voltage Divider Switched Voltage Follower Voltage Comparator I Voltage Comparator II Comparators Block Sensor Voltage Comparator Variable Current Mirrors Variable Current Mirrors Decoder Differential Amplifier Programmable Differential Amplifier Analog Multiplexer Follower and Differential Amplifier Current Source Signal Conversion Block II Summing Amplifier Switch Controlled Current Source Variable Gain Amplifier

15 MediaTek MT1688E DVD-ROM/CD-RW Drive Controller Page Variable Voltage Divider Variable Voltage Divider Controlled Current Source Decoder Voltage Approximation Machine Counter T Flip-Flop I T Flip-Flop II Controlled Current Source Window Comparator I Voltage Comparator I Voltage Comparator II Variable Width Transistors Window Comparator II Voltage Comparator III Voltage Comparator IV Variable Width Transistors Signal Conversion Block III Summing Amplifier Controlled Current Source Control Decoder Variable Gain Amplifier Programmable Voltage Divider Control Decoder Summing Amplifier Amplifier I Amplifier II Variable Resistor Variable Gain Amplifier Variable Voltage Divider Variable Voltage Divider Variable Voltage Divider

16 MediaTek MT1688E DVD-ROM/CD-RW Drive Controller Page Controlled Current Source Decoder Sensors Block Voltage Follower Analog Sensor Voltage Comparator Variable Width Transistors Signal Change Detector D Flip-Flop Signal Selectors Signal Selector I Signal Selector II Signal Selector III Signal Selector IV Signal Selector V Signal Selector VI Signal Selector VII Signal Selector VIII Window Comparators Voltage Comparator I Voltage Comparator II Voltage Comparator III Voltage Comparator IV Variable Width Transistors Schmitt Trigger Variable Voltage Divider Threshold Voltage Generator :1 Analog Multiplexer :1 Analog Multiplexer Bit Decoder :1 Analog Multiplexer :1 Analog Multiplexer

17 MediaTek MT1688E DVD-ROM/CD-RW Drive Controller Page Reference Voltage Buffers Bias Current Generator Current Sources I Current Sources II Programmable Current Sources I Programmable Current Sources II Voltage Generators Master Reference Generator Peripheral Voltages Generator Bandgap Reference Generator Primary Reference Voltage Generator Input Buffer Code Converter Path Multiplexer Programmable Voltage Divider Decoders Programmable Voltage Sources Programmable Voltage Divider Differential Amplifier I Differential Amplifier II Test Selector Bit D/A Converter I Differential Amplifier I Programmable Resistive Divider Open Loop Amplifier I Bit D/A Converter II Bit D/A Converter I Differential Amplifier II Programmable Voltage Divider I Open Loop Amplifier II Bit D/A Converter III

18 MediaTek MT1688E DVD-ROM/CD-RW Drive Controller Page Bit D/A Converter IV Summing Amplifier Output Comparators Bit D/A Converter II Programmable Voltage Divider II Differential Amplifier IV Programmable Voltage Divider III Output Selector Bias/Reference Generator Control Logic Control Buffers R-2R Ladder I R-2R Ladder II Test Circuitry Signal Switch I Signal Switch II Low Pass Filter to 1 Bidirectional MUX Signal Switch IV Signal Switch V PGA Variable Voltage Divider Signal Switch VI Signal Switch VII Signal Switch VIII Slope Voltage Generator Slope-Up Voltage Generator Slope-Down Voltage Generator Generator Mode Switch Signal Switch IX to 1 Bidirectional MUX

19 MediaTek MT1688E DVD-ROM/CD-RW Drive Controller Page Signal Switch X Voltage Follower I Voltage Follower II Bias Current Generator Operational Amplifier Bias Current Sources A.1.0 Symbol Conventions - 1 A.1.1 Symbol Conventions - 2 A.2.0 Symbol Definitions - 1 A.2.1 Symbol Definitions - 2 A.2.2 Symbol Definitions - 3 A.3.0 Logic Gate Size Notation A.4.0 Transistor Size Notation A.5.0 Capacitor Size Notation A.6.0 Resistor Size Notation

20 MediaTek MT1688E DVD-ROM/CD-RW Drive Controller Report Evaluation We value your business relationship at Chipworks. Your feedback is very important to help us better serve your future needs. Please take a few minutes to complete this evaluation to let us know if you were satisfied with this report. The information you provide will be used to strengthen our service quality program. Please rate Chipworks on this report at the following: On-Line Evaluation Form Rev /15/05 2:58 PM Y:\Reports_Public\MediaTek\MT1688E\Partial_CAR \CAR-report_evaluation.doc

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