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CPTR480-ENGR357 Quadrature SDR

Jeffrey-McCormick·CPTR480-ENGR357_Quadrature_SDR·Radio_Receiver_McCormick_Mendoza/Radio_Receiver_McCormick_Mendoza.kicad_pcb

CPTR480-ENGR357 Quadrature SDR PCB layout, top view — open source RP2040/RP2350 board by Jeffrey-McCormick
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About the CPTR480-ENGR357 Quadrature SDR PCB

CPTR480-ENGR357 Quadrature SDR is an open source RP2040/RP2350 PCB design by Jeffrey-McCormick, published on GitHub under the MIT license. It is a 4-layer board measuring 100 × 100 mm, with 244 components from 100 distinct parts.

Its main chip is the Pico, from the RP2040/RP2350 family. Other key parts include the TPS7A2045PDQN, TPS72733DSER, Si5351A-B-GT, SN74AC74DR and SN74CBT3253CDBR. By type, the board carries 97 capacitors, 53 resistors, 40 connectors, 16 inductors, 13 ICs and 13 jumpers.

It belongs with the rf & radio, audio and displays & leds designs in this gallery.

From the project

Quadrature sampling software defined radio for digital signal processing. Project for Embedded and Real Time Systems (CPTR480) and Engineering Electronics II (ENGR357).

This repository contains the KiCad schematics, PCB layouts, and Bills of Materials for the CPTR480 Quadrature Software Defined Radio (SDR) receiver board designed by Jeffrey McCormick and Daniel Mendoza for ENGR357 and CPTR480.

Other contributors: Riley Smith, Joshua Garbi

The radio is a direct-conversion, quadrature-sampling receiver (commonly utilizing a Tayloe Detector topology) managed by a Raspberry Pi Pico. The RF front-end downconverts the incoming antenna signal directly to baseband I (In-phase) and Q (Quadrature) audio signals, which are digitized and processed by the RP2040…

CPTR480-ENGR357 Quadrature SDR, from the project README
From the project README

Main components on the CPTR480-ENGR357 Quadrature SDR

TPS7A2045PDQNTPS72733DSERPicoSi5351A-B-GTSN74AC74DRSN74CBT3253CDBRINA821IDOPA1612AIDPCM1808PWRPCM5102A

CPTR480-ENGR357 Quadrature SDR bill of materials (BOM)

244 components, 100 distinct parts.

QtyPartRefs
2
TPS7A2045PDQN
U1, U2
1
TPS72733DSER
U3
1
Pico
U4
1
Si5351A-B-GT
U5
1
SN74AC74DR
U6
2
SN74CBT3253CDBR
U8, U13
2
INA821ID
U9, U11
1
OPA1612AID
U10
1
PCM1808PWR
U12
1
PCM5102A
U14
1
ASTX-H11-24.576MHZ-T
Y1
1
VBAT
J1
1
GND
J2
1
3.3VA
J3
1
4.5VA
J4
1
Conn_Coaxial
J5
1
Conn_01x02
J6
1
Micro_SD-TF_PUSH
J7
1
FIL_OUT
J8
1
CLK_1
J9
Show 80 more
QtyPartRefs
1
CLK_2
J10
1
I_LO
J11
1
Q_LO
J12
1
I_0
J13
1
I_180
J14
1
Q_90
J15
1
Q_270
J16
1
I_RAW
J17
2
Conn_01x02_Female
J18, J19
1
Q_RAW
J20
1
SDR Out
J21
1
VDDA
J23
1
CLK_0
J24
1
OLED
J25
1
+5V
J26
1
XFIL_IN
J33
1
XFIL_OUT
J34
2
3.5mm_Jack
J35, J46
1
+5RAW
J36
1
4.5V
J37
1
DAC_FLT
J38
1
VDD
J39
1
DAC_FMT
J40
1
V_DIV
J41
1
VDDA/2
J42
1
CENTER_TAP
J45
1
FIL_IN
J47
2
GNDA
J48, J49
8
Jumper_2_Open
JP2, JP3, JP4, JP7, JP8, JP9, JP11, JP12
3
Jumper_2_Bridged
JP5, JP6, JP10
1
SCK_SRC_JUMPER
JP14
1
USB Only
JP69
1
09.03290.01
ON/OFF1
1
Tactile Button, 160gf
S2
1
RotaryEncoder_Switch_MP
SW1
1
09.03290.01
SW6
1
Transformer_1P_SS
T1
3
Groundloop_Insurance
e3, e4, e5
1
BAV99,215
D1
1
Red
D2
1
1N5819WS
D5
12
~
FB1, FB11, FB12, FB13, FB14, FB15, FB16, FB17 +4
1
442 nH
L2
1
7.95 uH
L4
2
663 nH
L5, L6
10
10uF
C1, C5, C6, C12, C16, C21, C49, C60 +2
5
330pF
C2, C22, C30, C31, C87
4
100pF
C3, C4, C11, C19
2
2.2uF
C7, C17
7
100nF
C8, C13, C18, C35, C37, C94, C95
10
100nF
C9, C14, C15, C20, C26, C27, C29, C50 +2
13
10uF
C10, C25, C28, C39, C41, C44, C45, C46 +5
8
2.2nF
C23, C24, C42, C43, C51, C53, C54, C55
10
1uF
C32, C33, C34, C40, C64, C65, C70, C75 +2
2
10nF
C36, C38
2
1uF
C47, C48
5
10nF
C56, C69, C79, C81, C82
13
100nF
C58, C61, C62, C63, C66, C67, C72, C74 +5
5
100uF
C59, C68, C85, C86, C89
1
100nF
C91
3
1kΩ
R1, R2, R3
5
2.2Ω
R4, R32, R41, R42, R46
3
22Ω
R5, R39, R40
1
47kΩ
R6
3
10kΩ
R7, R8, R9
2
470Ω
R10, R29
2
1.01k
R11, R14
2
5.49k
R12, R15
2
12.3k
R13, R16
2
430Ω
R17, R18
7
33Ω
R19, R20, R21, R34, R35, R36, R48
2
4.7kΩ
R22, R23
4
100Ω
R24, R25, R26, R27
3
10Ω
R28, R31, R43
1
20kΩ
R30
2
10kΩ
R33, R44
1
220Ω
R37
1
6.8kΩ
R45
5
10kΩ
R47, R49, R50, R51, R54
2
22kΩ
R52, R53

CPTR480-ENGR357 Quadrature SDR design files

The KiCad project lives in the Jeffrey-McCormick/CPTR480-ENGR357_Quadrature_SDR repository on GitHub; these links point at the commit this page was built from.

CPTR480-ENGR357 Quadrature SDR: common questions

What microcontroller does the CPTR480-ENGR357 Quadrature SDR use?

The CPTR480-ENGR357 Quadrature SDR is built around the Pico, from the RP2040/RP2350 family.

How big is the CPTR480-ENGR357 Quadrature SDR PCB?

The CPTR480-ENGR357 Quadrature SDR measures 100 × 100 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the CPTR480-ENGR357 Quadrature SDR?

244 components, from 100 distinct parts. The full bill of materials is listed on this page.

Where can I download the CPTR480-ENGR357 Quadrature SDR design files?

From the Jeffrey-McCormick/CPTR480-ENGR357_Quadrature_SDR repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the CPTR480-ENGR357 Quadrature SDR design in my own project?

Yes, under the terms of its MIT license, which Jeffrey-McCormick chose for the repository.

Can I test firmware for the CPTR480-ENGR357 Quadrature SDR without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.

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