データシートサーチシステム |
|
CA3256 データシート(PDF) 5 Page - Harris Corporation |
|
CA3256 データシート(HTML) 5 Page - Harris Corporation |
5 / 11 page 8-5 Test Circuits Application Information CMOS analog switches are available in a wide variety of forms, and have been known and used for some time. There are a number of advantages to using the CMOS transmis- sion gate as a switch: • Ideal Suitability to Series Cascade Arrangements • Simple Multiple Parallel Input Switching Arrangements • No Bipolar Junctions and, Hence, No Offset • Very Low Power Consumption • Wide Signal-Swing Capability • Fast Multiplexing and Video Switching • Wide Bandwidth •Low RON Channel Resistance • Bidirectional Signal Handling An Integrated Video-Switch Amplifier Commonly, integrated video-switch amplifiers have been fabri- cated in the bipolar technology using differential amplifiers in a current-switching mode. In this form, two differential pairs are needed for two input-signal sources. The handling of multiple sources is very much more complex. The advantages of the CMOS video-switch amplifier have already been noted. While the bipolar video switch has high output drive and switching speed as advantages, the price is high in voltage offset and cur- rent drain. The integrated device solution that is offered here is in the use of the BiMOS technology, where both the CMOS and bipolar processes complement each other to provide CMOS switching with bipolar amplifiers. The BiMOS process allows several CMOS switches to be coupled to a bipolar drive-ampli- fier in the same process to exploit the best of two technologies. Other advantages are gained when the BiMOS process is used for an IC video-switch amplifier design. The BiMOS process calls for a P-substrate and, therefore, isolated N-epi- taxial wells can be built for both N and P channel parts. The boats provide for better isolation of the N and P channels. The N and P wells in a transmission-gate cell can be switched between source and rail; therefore, they have a smaller body effect on both N and P devices, which results in better gain linearity. Where desired, oxide capacitors are available for bipolar amplifier compensation. CA3256 Video-Switch Amplifier The Block Diagram shows the functional diagram of the CA3256, which consists of five MOS channels, each com- prising a three-element T-switch. The output of the five switches is made common and fed into the input of a bipolar CONTROL INPUTS (CHANNEL SELECT) 12 +12 V 10K 1K 10K 15 OUTPUT AMP 9 + FEEDBACK FEEDBACK SWITCH AMP OUT 11 10 2 1.1K 1.1K 1.1K 1.1K 4 GND 17 1 3 13 IN 1 IN 2 IN 3 IN 4 IN/OUT 5 AB 6 C 16 18 ENABLE 5 14 BIAS REG 8 +12 V 2 1 3 4 LLC ENABLE AND CHAN 1-4 SELECT 7 TG-1 TG-2 TG-4 TG-3 TG-5 V+ V- VBIAS VLED FIGURE 1. CA3256 TEST CIRCUIT (DIP PINOUT) (V- +5V) CA3256 |
同様の部品番号 - CA3256 |
|
同様の説明 - CA3256 |
|
|
リンク URL |
プライバシーポリシー |
ALLDATASHEET.JP |
ALLDATASHEETはお客様のビジネスに役立ちますか? [ DONATE ] |
Alldatasheetは | 広告 | お問い合わせ | プライバシーポリシー | リンク交換 | メーカーリスト All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |