运放设计指南

VIN VOUT = VIN
‫ٷݣ‬ଇ߲‫ۉ‬უኮֶĂᅞ዆ࠌఇ‫ۉ‬უ
࣐؋ߛፆੇ႑ࡽᇸࢅ‫گ‬ፆႠ޶ሜ
‫ۉ߲ܠቤተ መጻሕፍቲ ባይዱუ൱ࢅ
PRAO ཞ၎႑ࡽ‫ٷݣ‬ RFBH VIN
VGAI
၌዆႑ࡽ‫੻ټ‬
VOUT
= 20 Log
‫ۉ‬უ‫ݒ‬ઍ႙‫ٷݣ‬ഗ‫ڦ‬Կ࣍ೕ୲ၚᆌ ‫گ‬ཚ୳հഗ0ओ‫ݴ‬ഗ ‫ۉ‬უ‫ݒ‬ઍ႙‫ٷݣ‬ഗ‫ڦ‬Կ࣍ೕ୲ၚᆌ C
ኟ၀‫ۉ‬უࢅ‫ୁۉ‬ 1 .159 Վუഗ SR = or Hz RMS = ਩‫ = ߵݛ‬ᆶၳኵ ‫ۉ૴ز‬ፆ RG RF GAIN CONTROL V ‫ۉ‬უࢅፆੇࠅ๕ 2π√LC √LC (ժ૴) BIAS PWRA A (ืუईইუԲ) R2 VN, R2 VIN V = 0.707 V INTERFACE RMS PEAK = R + R + R + … R TOTAL 1 2 3 GAIN FROM = R2 R2 GAIN “A” TO OUTPUT RXL VA VAVE. = 0.637 VPEAK ‫ٷݣ‬ժ‫ݒ‬ገ๼෇ PRAO VGAI RFBH 1 V (dB) R B Z = (RL) Z= 1 1 EP IS ZP NP VA VOUT VNEG VPOS VCOM GPOS NOISE GNEGGAIN = C = L = VIN ཞ၎႑ࡽ‫ٷݣ‬ ࣐؋ߛፆੇ႑ࡽᇸࢅ‫گ‬ፆႠ޶ሜ VN, R1 2 2 V = 1.414 V V IN– VN, R2 I VOUT 4kTR2 = = = PEAK EFF. OUT RF ժ૴‫ۉ‬ፆ 2S 2X 2L R1 √R + LINE B VOUT PrA VIN ATTENUATOR VOUT 4π 4π2 SR R1 GAIN FROM = R2 R2 R3 R CL NS ES IP ZS 1 VIN GAIN RFBH VEFF. = 1.11 VAVE. TO OUTPUT NG = 1 + VB C GAIN (dB) = V 20log + 1 + 50dB G“A” POS – GNEG + 16.5dBR1 (dB) VCM RFBL V VOUT RFBL R1 RTOTAL = RXC VPEAK = 1.57 VAVE. NOISE GAIN = VN 4kTR2 VN, R1 4kTR1 CLOSEDRN IN– R2 1 1 1 (RC) VA = VL = VC = VR Z= B ‫گ‬ཚ୳հഗ0ओ‫ݴ‬ഗ LOOP BW ‫ۉ‬უ३݆ഗ0ֶ‫ٷݣۯ‬ഗ ‫ۉ‬უे݆ഗ V R1 OUT R2 V + + + … 2 V = 0.9 V N GAIN CONTROL AVE. EFF. = fCL 1዁1000NG √ R + XC2 =1+ t= RC = RFC VN, R3 OPENBIAS R R R ॽ๼෇႑ࡽ‫ٷݣ‬ ԠLj PWRA ‫ۉ‬უ३݆ഗ0ֶ‫ٷݣۯ‬ഗ ߛཚ୳հഗ0ྲ‫ݴ‬ഗ LOOP ཞ၎ሏ໙‫ٷݣ‬ഗ ཞ၎ሏ໙‫ٷݣ‬ഗ ‫ݒ‬၎ሏ໙‫ٷݣ‬ഗ ‫ݒ‬၎ሏ໙‫ٷݣ‬ഗ ‫ۉ‬უ߶ໜഗ ‫ۉ‬უ߶ໜഗ ‫گ‬ཚ୳հഗ0ओ‫ݴ‬ഗ ‫ۉ‬უे݆ഗ 1 2 3 R1 R ֶ‫ٷݣݴ‬ഗ RF ᅏ՗‫ٷݣ‬ഗ INTERFACE 6dB/OCTAVE A 1 R3 IN+ LOOP C GAIN VN GAIN FROM = – R2 CLOSEDVA 4kTR1 ยዃ 0dB ዁60dBLjᆯVGAIN ROLL-OFF R2 RF GAIN R1 ኟ၀‫ۉ‬უࢅ‫ୁۉ‬ R “B” TO OUTPUT VOUT R1 LOOP BW F Վუഗ XL XC + RF RG RG RF RF 1 –RF C R2' R3' ଇ߲‫ۉ‬ፆժ૴ Z = √R2 + (XL – XC)2 (RLC‫)૴ز‬ VA V R + = f VNEG VPOS VCOM GPOS GNEG V = V –V 2 (LC) VA = ILINEZ Z= X –X ౹ఛۨୱ(኱ୁ‫ۉ‬ୟ) CL R OPEN× IN 10k OUT IN RMS = ਩‫ߵݛ‬ = ᆶၳኵ N, R3 4kTR3 2 ‫ࠅੇۉ‬๕ LOOP VIN VIN A1 ( ืუईইუԲ ) 6dB/OCTAVE AV R1 RFCS +1 V I L C R3R LOOP R1 R2 B ፆੇࠅ๕ ( ‫૴ز‬ ) N+~ GAIN GAIN FROM V V 2 R R ROLL-OFF 2 ‫ٷݣ‬ժ‫ݒ‬ገ๼෇ A = – OUT 10k 1 2 VRMS = 0.707 V CIN RFBH ‫ۉ‬უ‫ݒ‬ઍ႙‫ٷݣ‬ഗ‫ڦ‬Կ࣍ೕ୲ၚᆌ GAIN ‫ڇ‬टဣཥ‫ڦ‬ሏ໙‫ٷݣ‬ഗሯำ PEAK Q & Resonant Frequency Formulas ‫ݴ‬Ԟ (dB) ࠅ๕(‫ڪ‬ኵፆੇ ) VOUTPUT “B” TO R1 OUT 2 GAIN (dB) = 20log 1 + 50dB RF R1 R VB R GPOS – GNEG + 16.5dB 1 R3 Z = VA R+ TOTAL = 1 R2 VV RFBL V G VOUT ཞ၎႑ࡽ‫ٷݣ‬ ޶ሜ VIN 2 2 (RL OUT A 2 I Z N V = 0.637 V XC = (RLC) R +R2 Q & V ‫ݴ‬Ԟ (dB) ࠅ๕ ( ‫ڪ‬ኵፆੇ ) 4kTR3 RX Z = X ‫૴ز‬ ) + 4kTR3 + 4kTR1 V P √R +E P SResonant PFrequency Formulas VOUT AVE. R PEAK VOUT 1 IN V N VOUT VOUT L V 2 V R R ‫ۉ૴ز‬ፆ C CM Z = R1' R1 + R2 V B F R3 V 1 RIN CLOSEDG = =Q & X = V V VOUT SI ‫ۉ߲ܠ‬უ൱ࢅ ‫ٷݣ‬ଇ߲‫ۉ‬უኮֶĂᅞ዆ࠌఇ‫ۉ‬უ Merit NOISE ၌዆႑ࡽ‫੻ټ‬ OUT V VCM L Figure of VOUT Resonant Frequency Formulas ‫ݴ‬Ԟ (dB)P ࠅ๕ R1 VIN OUT R VPEAK = 1.41424.7k VEFF. RTI NOISE = BW × VIN ‫ڇ‬टဣཥ‫ڦ‬ሏ໙‫ٷݣ‬ഗሯำ ‫ۉ‬უ‫ݒ‬ઍ႙‫ٷݣ‬ഗ‫ڦ‬Կ࣍ೕ୲ၚᆌ VOCM VIN VIN A3 OUT (‫ڪ‬ኵፆੇ) V OUT √R2 + X2 2π fC LOOP NS E I+ Z+ VC QR = Q = SR. VB ॽ๼෇႑ࡽ‫ٷݣ‬ RN S = PX R2Figure S Merit + R … R GAIN 2 2 R R R1 TOTAL 1 3 1 ዁ 1000 ԠLj ‫ڪ‬ኵ‫ۉ‬ፆժ૴ R db = 10 Log = 20 Log of of a Coil 2 2 GAIN V R. V P VCM RL ) R2 R1 OUT OUT + VEFF. = 1.11 VAVE. OUT R ~ VN VOUT P Z = √R2 + XC2 (RC P V Q ‫૴ز‬ = X Q = B.W. VN, R2 R1 × R2 2 10k 4kTR1 IN IN R 2+ I 2 ยዃ 0dB዁60dB Ljᆯ V SR. + 4kTR2 t = RC = RFC db = 10 Log = 20 Log I2RV N VN + 4kTR3 + IN+2 + R3 Figure of Merit XL = 2π fL R a Coil R L of N– R1 + R2 P GAIN ഄዐ R ྺ‫ڪ‬ኵ‫ۉ‬ፆኮᅃ‫ڦ‬ፆኵLj (Tuned Circuit) GAIN FROM = R B.W. CLOSED2 R G R2 OUT OUT + R1 + R2 R1 + R2 NOISE Q = Q = P V V VPEAK = 1.57 IN IN RTIV NOISE = BW × “A” TO OUTPUT V = VAVE. GAIN RTOTAL N I R2 = 20 Log LOOP ‫گ‬ཚ୳հഗ0ओ‫ݴ‬ഗ ‫ۉ‬უ३݆ഗ0ֶ‫ٷݣۯ‬ഗ ‫ۉ‬უे݆ഗ +V ժ૴‫ۉ‬ፆ OUT of a Coil t = RC = R C IN db = 10 Log VOUT = V VOUT = V R B.W. (Tuned Circuit) GAIN N ྺ‫ڪ‬ኵ‫ۉ‬ፆ‫ڦ‬ຕଉ ~ F 10k (dB) 常用1% 电阻值 IN IN 2 N Log 20 (Gain) 2 VIN A2 2 GAIN IN VAVE. = 0.9= VEFF. IP Z = XL – XC (LC‫)૴ز‬ NOISE GAIN = VN, R2 R fCL V BANDWITH 1 –R OUT .159 BW = 1.57 R1 × R2 IN–CLOSED-LOOP RTO NOISE = NG × RTI 2 NOISE 4kTR2 (Tuned Circuit) √P 1%精度的电阻阻值范围为 1 1 I R1 RF + 4kTR2 R3 IN VOUT =B VIN N,FR1 = 20 Log (Gain) + IN+ R32 + IN–2 2R1 VI R GAIN FROM × + R1 R2 ‫ۉ‬უࢅፆੇࠅ๕ ժ૴ ) M、1.80 M、2.00 M和2.20 M)。 SR = or 1.10 到1.00M( M、Hz 1.20 M、1.30 M、1.50 ( M 、1.60 F C V = V RF Iࠅ๕ VREF ཞ၎ሏ໙‫ٷݣ‬ഗ ‫ۉ‬უ߶ໜഗ RINCS ‫ݒ‬၎ሏ໙‫ٷݣ‬