Commit 3884fb0b authored by Anders Wallin's avatar Anders Wallin

notes on overall gain.

parent 1ac7319f
......@@ -74,7 +74,7 @@ L R R101
U 1 1 5654DA6F
P 2250 2350
F 0 "R101" V 2330 2350 50 0000 C CNN
F 1 "49R9" V 2250 2350 50 0000 C CNN
F 1 "51R" V 2250 2350 50 0000 C CNN
F 2 "Resistors_SMD:R_0805" V 2180 2350 30 0001 C CNN
F 3 "" H 2250 2350 30 0000 C CNN
1 2250 2350
......@@ -248,8 +248,8 @@ F 3 "" H 3150 2350 30 0000 C CNN
1 3150 2350
-1 0 0 -1
$EndComp
Text Notes 650 3150 0 60 ~ 0
+20 dBm input is 6.324Vpp or 100mW\n0805-sized resistor should be OK to 125 mW
Text Notes 750 3300 0 60 ~ 0
Input Power:\n+20 dBm input is 6.324Vpp or 100mW\n0805-sized resistor should be OK to 125 mW\n\nInput Impedance:\n51R in parallell with 2k010 gives Z_in = 49R7
Wire Wire Line
3150 2550 3900 2550
Wire Wire Line
......@@ -581,8 +581,8 @@ Wire Wire Line
2550 5300 2750 5300
Wire Wire Line
2550 5100 2750 5100
Text Notes 2150 3750 0 60 ~ 0
input-stage: LMH6702, \noutput-stage: LMH6609,
Text Notes 750 3750 0 60 ~ 0
Op-Amps:\ninput-stage: LMH6702, \noutput-stage: LMH6609,
$Sheet
S 7300 3850 1050 200
U 57DA795D
......@@ -716,4 +716,6 @@ Wire Notes Line
2500 6550 3400 6550
Text Notes 2550 6900 0 60 ~ 0
Note: front-edge M3 mounting holes removed\nas of 2018-01 design revision (to make room for THT LEDs)
Text Notes 9150 3700 0 60 ~ 0
Overall Gain:\nInput Impedance: ca 0 dB\nInput divider R102/R103: -0.04 dB\nU101 gain: +6.25 dB\nR201/202 divider: -6.06 dB\nU201 gain: +6.02 dB\noutput impedance: -6.04 dB\n\nTotal +0.12 dB
$EndSCHEMATC
......@@ -78,7 +78,7 @@ AR Path="/56587A93/5654CEA7" Ref="R706" Part="1"
AR Path="/56587AB2/5654CEA7" Ref="R806" Part="1"
AR Path="/57DA795D/5654CEA7" Ref="R1006" Part="1"
F 0 "R206" V 6230 3300 50 0000 C CNN
F 1 "51R" V 6150 3300 50 0000 C CNN
F 1 "49R9" V 6150 3300 50 0000 C CNN
F 2 "Resistors_SMD:R_0805" V 6080 3300 30 0001 C CNN
F 3 "" H 6150 3300 30 0000 C CNN
1 6150 3300
......@@ -638,7 +638,7 @@ AR Path="/56587A93/58B925F2" Ref="R709" Part="1"
AR Path="/56587AB2/58B925F2" Ref="R809" Part="1"
AR Path="/57DA795D/58B925F2" Ref="R1009" Part="1"
F 0 "R209" V 6880 3300 50 0000 C CNN
F 1 "DNI" V 6800 3300 50 0000 C CNN
F 1 "0R" V 6800 3300 50 0000 C CNN
F 2 "Resistors_SMD:R_0805" V 6730 3300 30 0001 C CNN
F 3 "" H 6800 3300 30 0000 C CNN
1 6800 3300
......@@ -765,8 +765,8 @@ Wire Notes Line
11150 6400 6950 6400
Wire Notes Line
6950 6400 6950 5450
Text Notes 6600 3100 0 60 ~ 0
R209 is 100nF cap\nfor AC-coupled Output
Text Notes 6350 3150 0 60 ~ 0
R209: use 100nF cap\nfor AC-coupled Output
Text Notes 2350 4650 0 60 ~ 0
C206 is used to limit gain-peaking \nand BW variations among the 8 outputs.\n\nRC-filter with R201\nC206 = 5 pF limits BW to ca 30 MHz
$EndSCHEMATC
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment