SHOULDER ELECTRONICS LTD The Difference of the SAW FILTER Design between SHOULDER and Competitor SHOULDER ELECTRONICS LTD

CONTENTS Background The interface of the Program of SAW Filter Designing—Developed by SHOULDER Examples of single channel SAW Filter Designing—SHOULDER 3-1. BF36A1Dc VS X6966D 3-2. BF36A2Dc VS X6857D 3-3. BF36A8Dc VS X6874D 3-4. BF37A6Dc VS X6783X 3-5. BF44A12Dc VS X6764D 3-6. VF389A1Dc VS K3953D 3-7. VF389A6Dc VS K3965D Competitor’s Patent about dual channel SAW Filter SHOULDER’s design principle of a dual channel filter Examples of dual channel SAW Filter Designing –SHOULDER 6-1. BF36A5Dc VS X7251D 6-2. BF36A7Dc VS X7250D 6-3. BF36A11Dc VS X7255D Conclusion

1. Background Shoulder is a famous SAW FILTER manufacture in China, and serves our Customer with improving quality and competitive price for several years. Shoulder has an experienced and powerful R&D team, and always dedicate to development and research of SAW Technology . and resulted in intellectual property , and obtained many national patents. Patent no. ZL01262927.8; ZL02218433.0; ZL200520140322.2; ZL2005100226742; For the purpose of Holding the market, Shoulder’s competitor libels that Shoulder has some Paten issue. Shoulder will apply some example as follow to show the difference between our own design technology and our Competitor’s

2. The interface of the Program of SAW Filter Designing—developed by SHOULDER

3. Examples of single channel SAW Filter Designing 3-1. BF36A1Dc VS X6966D ITD of E X6966D IDT of SHOULDER BF36A1Dc The outline sketch of two input ITD’s

Compare BF36A1Dc with E X6966D Group delay BF36A1Dc & theory result Frequency response

3-2. BF36A2Dc VS X6857D Input IDT of E X6857D Input IDT of SHOULDER BF36A2Dc The outline sketch of two input ITD’s

Compare BF36A2Dc with E X6857D BF36A2Dc & theory result Frequency response Group delay

3-3. BF36A8Dc VS X6874D IDT of E X6874D IDT of SHOULDER BF36A8Dc The outline sketch of two input ITD’s

Compare BF36A8Dc with E X6874D BF36A8Dc & theory result Frequency response Group delay

3-4. BF37A6Dc VS X6783X Input IDT of E X6783X Input IDT of SHOULDER BF37A6Dc The outline sketch of two input ITD’s

COMPARED WITH E X6783X BF37A6Dc with theory result Frequency response Group delay

3-5. BF44A12Dc VS X6764D Input IDT of E X6764N Input IDT of SHOULDER BF44A12Dc The outline sketch of two input ITD’s

Compare BF44A12Dc with E X6764N BF44A12Dc with theory result Frequency response Group delay

3-6. VF389A1Dc VS K3953D Input IDT of E K3953D Input IDT of SHOULDER VF389A1Dc The outline sketch of two input ITD’s

Compare VF389A1Dc with E K3953D VF389A1Dc & theory result Frequency response Group delay

3-7. VF389A6Dc VS K3965D Input IDT of E K3965D Input IDT of SHOULDER VF389A6Dc The outline sketch of two input ITD’s

Compare VF389A6Dc with E K3965D VF389A6Dc & theory result Frequency response Group delay

4. E Patent about dual channel SAW Filter US Patent No. 5867075 Data of Patent: Feb. 2, 1999 Apply to E’s X72**, K72** series

5. SHOULDER’s design principle of a dual channel filter Step 1, make a narrow band filter Step2, make a differential filter Step 3, narrow band filter + differential filter Step4, have a wide band filter

6. Examples of dual channel SAW Filter Designing –SHOULDER 6-1. BF36A5Dc VS X7251D Input IDT of E X7251D Input IDT of SHOULDER BF36A5Dc

Compare BF36A5Dc with E X7251D CH1 BF36A5Dc & theory result Frequency response Group delay

Compare BF36A5Dc with E X7251D CH2 BF36A5Dc & theory result Frequency response Group delay

6-2. BF36A7Dc VS X7250D Input IDT of E X7250D Input IDT of SHOULDER BF36A7Dc

Compare BF36A7Dc with EX7250D CH1 BF36A7Dc & theory result Frequency response Group delay

Compare BF36A7Dc with E X7250D CH2 BF36A7Dc & theory result Frequency response Group delay

6-3. BF36A11Dc VS X7255D Input IDT of E X7255D Input IDT of SHOULDER BF36A11Dc

Compare BF36A11Dc with E X7255D CH1 BF36A11Dc & theory result Frequency response Group delay

Compare BF36A11Dc with E X7255D CH2 BF36A11Dc & theory result Frequency response Group delay

7. Conclusion SHOULDER has own SAW FILTER Design technology There are no relation to other competitor

Thank you !