bjt module#

BJT transistor symbols for JITX Standard Library

This module provides BJT (Bipolar Junction Transistor) symbol definitions for NPN and PNP transistors.

class BJTJunction(*values)[source]#

Bases: Enum

BJT junction types

Defines the junction type for bipolar junction transistors.

NPN = 'npn'#

PNP = 'pnp'#

class BJTConfig(arrow_config=None, label_config=None, pitch=3.0, width=2.0, porch_width=0.25, base_line_length=2.3, outline=True, line_width=0.1)[source]#

Bases: LabelConfigurable, ArrowConfigurable

Configuration for BJT symbols

Defines the geometric and visual parameters for BJT transistor symbols.

Parameters:

arrow_config (ArrowConfig | None)
label_config (LabelConfig | None)
pitch (float)
width (float)
porch_width (float)
base_line_length (float)
outline (bool)
line_width (float)

pitch: float = 3.0#: Distance between collector and emitter pins

width: float = 2.0#: Distance from collector/emitter line to base pin

porch_width: float = 0.25#: Length of porch lines from pins to angled lines

base_line_length: float = 2.3#: Length of the vertical base line

outline: bool = True#: Whether to draw circle outline around transistor

line_width: float = 0.1#: Width of symbol lines

class BJTSymbol(junction_type=BJTJunction.NPN, config=None, **kwargs)[source]#

Bases: LabelledSymbol, Generic

BJT transistor symbol with graphics and pins.

The BJT symbol consists of: - Emitter line with arrow (direction indicates NPN/PNP) - Collector line - Base line (vertical) - Optional circle outline

Pins: ‘B’ (base), ‘C’ (collector), ‘E’ (emitter)

Parameters:

junction_type (BJTJunction)
config (T)

emitter_arrow: Arrow#

collector_line: Shape[Polyline]#

top_porch: Shape[Polyline]#

bottom_porch: Shape[Polyline]#

base_line: Shape[Polyline]#

base_conn: Shape[Polyline]#

outline_circle: Shape[ArcPolyline] | None#

B: Pin#

C: Pin#

E: Pin#

config: T#

junction_type: BJTJunction#

property pitch: float#: See pitch.

property width: float#: See width.

property porch_width: float#: See porch_width.

property base_line_length: float#: See base_line_length.

property outline: bool#: See outline.

property line_width: float#: See line_width.

property label_config: LabelConfigurable#: Configuration object that provides label configuration