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0.1-10Hz 放大器噪聲測(cè)量濾波器PCB樣圖：
0.png (136.53 KB, 下載次數(shù): 350)
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2016-6-13 14:53 上傳
PCB線路圖：
0.png (112.4 KB, 下載次數(shù): 341)
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2016-6-13 14:55 上傳
電路原理圖采用opa827芯片：
0.png (48.54 KB, 下載次數(shù): 343)
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2016-6-13 14:54 上傳
0.png (70.98 KB, 下載次數(shù): 355)
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2016-6-13 14:53 上傳
此電路設(shè)計(jì)用于將低頻噪聲（0.1Hz 至 10Hz）放大至示波器可輕松測(cè)量到的電平。它通過(guò)一個(gè) 0.1Hz 二階高通濾波器和一個(gè) 10Hz 四階低通濾波器實(shí)現(xiàn)此功能。0.1Hz 至 10Hz 噪聲測(cè)量是放大器數(shù)據(jù)表中給出的一個(gè)常見(jiàn)優(yōu)值。此設(shè)計(jì)旨在簡(jiǎn)化常用不同封裝樣式的 0.1Hz 至 10Hz 噪聲測(cè)量。
對(duì) 0.1Hz 至 10Hz 噪聲進(jìn)行濾波
以系數(shù) 100,000 對(duì)噪聲進(jìn)行放大
允許對(duì)常見(jiàn)放大器封裝配置進(jìn)行測(cè)試
bom表：
1 | 14 | 0.1uF | C1, C4, C7, C8, C9, C10, C13, C14, C16, C18, C19, C20, C21, C22 | CAP, CERM, 0.1uF, 50V, +/-5%, X7R, 0805 | AVX | 08055C104JAT2A | 478-3352-1-ND | 2 | 2 | 4.7uF | C2, C3 | CAP, CERM, 4.7uF, 16V, +/-20%, X7R, 1206 | TDK | C3216X7R1C475M160AB | 445-5994-1-ND | 3 | 2 | 7.5n | C5, C6 | CAP CER 7500PF 50V 5% NP0 0805 | TDK | GRM2195C1H752JA01D | 490-1639-1-ND | 4 | 2 | 1uF | C11, C12 | CAP, CERM, 1uF, 50V, +/-10%, X7R, 0805 | TDK | C2012X6S1H105K085AB | 445-14501-1-ND | 5 | 2 | 0.1uF | C15, C17 | CAP CER 1UF 50V 10% X6S 0805 | TDK | C2012X6S1H105K085AB | 445-14501-1-ND | 6 | 4 |
| H1, H2, H3, H4 | Machine Screw, Round, #4-40 x 1/4, Nylon, Philips panhead | B&F Fastener | NY PMS 440 0025 PH | H542-ND | 7 | 1 | Vs+ | J1 | Standard Banana Jack, Uninsulated, 5.5mm | Keystone | 575-4 | 575-4K-ND | 8 | 1 | GND | J2 | Standard Banana Jack, Uninsulated, 5.5mm | Keystone | 575-4 | 575-4K-ND | 9 | 1 | Vs- | J3 | Standard Banana Jack, Uninsulated, 5.5mm | Keystone | 575-4 | 575-4K-ND | 10 | 2 |
| J4, J5 | CONN BNC JACK R/A 75 OHM PCB | TE Connectivity | 1-1478032-0 | A97560-ND | 11 | 5 |
| JMP1, JMP2, JMP3, JMP4, JMP5, JMP6, JMP7 | CONN HEADER 50POS .100" SGL GOLD (cut as needed) | Samtec Inc | TSW-150-07-G-S | SAM1029-50-ND | 12 | 5 | 10 | R1, R4, R14, R18, R20 | RES 10.0 OHM 1/10W 0.1% 0805 | TE Connectivity | 1-1614884-7 | A103143CT-ND | 13 | 5 | 10.0k | R2, R5, R15, R19, R21 | RES 10K OHM 1/8W .1% 0805 SMD | Panasonic | ERA-6AEB103V | P10KDACT-ND | 14 | 1 | 1.6M | R3 | RES 1.6M OHM 1/10W 0.1% 0805 | TE Connectivity | 1-1614959-2 | A103800CT-ND | 15 | 2 | 825k | R6, R11 | RES 825K OHM 1/8W 0.5% 0805 SMD | Panasonic | ERA-6AED8253V | P825KBNCT-ND | 16 | 2 | 2.00Meg | R7, R8 | RES, 2.00Meg ohm, 1%, 0.125W, 0805 | Vishay-Dale | CRCW08052M00FKEA | 541-2.00MCCT-ND | 17 | 1 | 162k | R9 | RES 162K OHM 1/8W .1% 0805 SMD | Vishay-Dale | ERA-6AEB1623V | P162KDACT-ND | 18 | 1 | 210k | R10 | RES 210K OHM 1/8W .1% 0805 SMD | Panasonic | ERA-6AEB2103V | P210KDACT-ND | 19 | 1 | 412k | R12 | RES 412K OHM 1/8W .1% 0805 SMD | Panasonic | ERA-6AEB4123V | P412KDACT-ND | 20 | 1 | 634k | R13 | RES 634K OHM 1/8W .1% 0805 SMD | Panasonic | ERA-6AEB6343V | P634KDACT-ND | 21 | 1 | 1.00k | R16 | RES, 1.00k ohm, 1%, 0.125W, 0805 | Panasonic | ERA-6AEB102V | P1.0KDACT-ND | 22 | 1 | 9.09k | R17 | RES 9.09K OHM 1/8W .1% 0805 SMD | Panasonic | ERA-6AEB9091V | P9.09KDACT-ND | 23 | 0 |
| R23 | Optional for gain set, Do Not Populate for Gain=1 |
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| | 24 | 1 | 0 | R22 | RES 0.0 OHM 1/8W JUMP 0805 SMD | Panasonic | ERJ-6GEY0R00V | P0.0ACT-ND | 25 | 1 | GND | TP1 | Test Point, TH, Compact, Red | Keystone | 5124 | 5005K-ND | 26 | 1 | Vs- | TP2 | Test Point, TH, Compact, Red | Keystone | 5124 | 5005K-ND | 27 | 1 | Vs+ | TP3 | Test Point, TH, Compact, Red | Keystone | 5124 | 5005K-ND | 28 | 3 |
| U5, U6, U7, U8 | IC OPAMP JFET 22MHZ SGL 8VSSOP | Texas Inst. | OPA827AID | 296-24280-1-ND |
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