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Moog Little Phatty Stage II User Manual

Moog Little Phatty Stage II
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Moog Little Phatty Stage II Specifications

General IconGeneral
BrandMoog
ModelLittle Phatty Stage II
CategorySynthesizer
LanguageEnglish

Summary

Core Processing Unit

Microcontroller and Support

Details the C8051F021 MCU, memory, clock, and reset circuits.

User Interface and Debugging

JTAG Interface

Connection for programming, debugging, and testing the microcontroller.

Additional Input Interfaces

LED Status Indicators

Analog Input and CV Processing

Front Panel CV Input Controls

Potentiometers for controlling CV signals like Filter, EGR, and Oscillator.

Digital-to-Analog Conversion

DAC Output Circuits

Circuits for converting digital signals to analog control voltages.

LFO CV Multiplexing and DACs

Additional DAC Outputs

Further DAC circuits for generating control voltages.

Oscillator CV Multiplexing

Oscillator Waveform Selection Mux

Multiplexer for selecting oscillator waveforms.

Filter CV Multiplexing

Filter Control Signal Mux

Multiplexer for routing filter control signals.

EGR Mux and Volume CV Control

Pitch and Modulation Control Circuits

LHC Controller Implementation

Control circuitry for pitch and modulation wheels.

Keyboard Control Circuits

Keyboard Glide Functionality

Circuits managing the keyboard glide effect.

Pitch Wheel Driver Circuits

Driver circuits for the pitch wheel control.

Filter EGR Control Circuits

Volume EGR Control Circuits

Analog CV Jack Connections

MIDI Communication Interface

MIDI Input/Output Jack Connections

Jacks for MIDI data transmission and reception.

External Connector Interfaces

Power Supply Regulation Circuits

Voltage Regulator Circuitry

Circuits designed to ensure stable voltage levels for operation.

Filter and EGR CV Input Circuits

CV Input Processing

Processing of Filter and EGR CV inputs.

Front Panel Switch Functions

Oscillator 1 Circuitry

Oscillator 1 Wave Shaping Details

Osc1 Firmware Calibration Parameters

Calibration settings for Oscillator 1 firmware.

Oscillator 2 Circuitry

Oscillator 2 Wave Shaping Details

External Audio Input Circuitry

Mixer and Auto-Tune Circuits

Oscillator Signal Mixing

Combining signals from different oscillators.

Overload Protection Circuit

Filter Control Circuitry

Filter Ladder Circuit Implementation

Filter Ladder Design Details

Specific implementation details of the filter ladder.

Audio Output Control Circuits

Audio Output VCA Implementation

Voltage Controlled Amplifier for Audio

VCA circuit for processing audio output signals.

CV Out Modification Guide

CV Out Mod Installation Procedure

CV Out Mod Wiring Instructions

Wire Assembly Connections

Detailed instructions for connecting wire assemblies.

CV Out Mod Testing and Calibration

CV Output Calibration Specifications

Target voltage specifications for CV outputs during calibration.

LP Tribute Mod Differences

Tribute Wiring and Power Checks

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