35 lines
2.1 KiB
Markdown
35 lines
2.1 KiB
Markdown
---
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title: att
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updated: 2022-01-08 13:54:39Z
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created: 2022-01-08 13:18:05Z
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---
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN" "http://www.w3.org/TR/REC-html40/strict.dtd">
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<html>
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<head>
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<meta name="qrichtext" content="1" />
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<style type="text/css">
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p, li { white-space: pre-wrap; }
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</style>
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</head>
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<body style="font-family:'Tahoma'; font-size:10pt; font-weight:400; font-style:normal;">
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<p style="margin:0px;">1.1-1.7G功放用数控衰减器，可调范围30dB，步进1dB</p>
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<p style="-qt-paragraph-type:empty; margin:0px;"><br /></p>
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<p style="margin:0px;"><span style=" text-decoration: line-through;">拟采用HMC470，经核查，其步进1dB，总31dB，单价23/10片，无精度要求则可用</span></p>
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<p style="margin:0px;">拟采用PE4312，经核查，其步进0.5dB，总31.5dB，单价10/10片，可做精度补偿，宽压供电，兼容1.8V控制电平</p>
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<p style="margin:0px;">单片机拟用STM8S003</p>
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<p style="margin:0px;">控制拟采用串口，兼容232TTL和422</p>
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<p style="margin:0px;">稳压采用<span style=" text-decoration: line-through;">稳压二极管+LDO的方式，总功耗约30mA*Uin，缺点是需要适配BOM</span></p>
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<p style="margin:0px;">或采用高压LDO的方式，<span style=" text-decoration: line-through;">考虑器件通用性及保护性，LDO稳压至5V，二极管稳至3.3V</span>，优点是一套BOM</p>
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<p style="margin:0px;">暂定为SE8633K2-HF，单价0.8/1片，输入最高60V，输出200mA，保护电流400mA</p>
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<p style="-qt-paragraph-type:empty; margin:0px;"><br /></p>
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<p style="-qt-paragraph-type:empty; margin:0px;"><br /></p>
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<p style="-qt-paragraph-type:empty; margin:0px;"><br /></p>
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<p style="margin:0px;">PE4312频率范围1MHz-4GHz，可适用于短波</p>
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<p style="margin:0px;">PE43602频率范围？GHz，有国产化替代,SS114</p>
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<p style="margin:0px;"><span style=" font-weight:600;">PE43711</span>频率范围9 kHz-6GHz，可适用于短波，有国产化替代,SS115</p>
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<p style="-qt-paragraph-type:empty; margin:0px;"><br /></p>
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<p style="margin:0px;">综上，输入5-60V/30mA</p>
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</body>
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</html> |