octelec - Electronics calculations Wiki

Electronics calculations in GNU Octave

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Functions by category

Functions by category
E series values
Two-port parameter sets for special circuits
Operational characteristics calculation
- Formal AC equivalent circuit
- Physical AC equivalent circuit
two-port parameter set conversions
- Conversion between H, Z, Y, K, and A parameters
- H parameter set conversion for common emitter, common collector, and common base circuits
Ratio to dB and vice versa conversions
Parallel impedances
Rounding

E series values

E3_value: Choose value from E3 series closest to a given value.
E6_value: Choose value from E6 series closest to a given value.
E12_value: Choose value from E12 series closest to a given value.
E24_value: Choose value from E24 series closest to a given value.
E48_value: Choose value from E48 series closest to a given value.
E96_value: Choose value from E96 series closest to a given value.
E192_value: Choose value from E192 series closest to a given value.

Two-port parameter sets for special circuits

y_params_resistor_horizontal: Create Y parameter set matrix for horizontal resistor.
z_params_resistor_vertical: Create Z parameter set matrix for vertical resistor.

Operational characteristics calculation

Formal AC equivalent circuit

Voltage gain

h_params_voltage_gain: Calculate voltage gain for two-port circuit specified by H parameter set and load resistor.
z_params_voltage_gain: Calculate voltage gain for two-port circuit specified by Z parameter set and load resistor.
y_params_voltage_gain: Calculate voltage gain for two-port circuit specified by Y parameter set and load resistor.
a_params_voltage_gain: Calculate voltage gain for two-port circuit specified by A parameter set and load resistor.

Input impedance

h_params_input_impedance: Calculate input impedance for two-port circuit specified by H parameter set and load resistor.
z_params_input_impedance: Calculate input impedance for two-port circuit specified by Z parameter set and load resistor.
y_params_input_impedance: Calculate input impedance for two-port circuit specified by Y parameter set and load resistor.
a_params_input_impedance: Calculate input impedance for two-port circuit specified by A parameter set and load resistor.

Output impedance

h_params_output_impedance: Calculate output impedance for two-port circuit specified by H parameter set and generator impedance.
z_params_output_impedance: Calculate output impedance for two-port circuit specified by Z parameter set and generator impedance.
y_params_output_impedance: Calculate output impedance for two-port circuit specified by Y parameter set and generator impedance.
a_params_output_impedance: Calculate output impedance for two-port circuit specified by A parameter set and generator impedance.

Current gain

h_params_current_gain: Calculate current gain for two-port circuit specified by H parameter set and load resistor.
z_params_current_gain: Calculate current gain for two-port circuit specified by Z parameter set and load resistor.
y_params_current_gain: Calculate current gain for two-port circuit specified by Y parameter set and load resistor.
a_params_current_gain: Calculate current gain for two-port circuit specified by A parameter set and load resistor.

Voltage gain, input impedance, output impedance, and current gain

h_params_op_characteristics: Calculate operational characteristics for two-port circuit specified by H parameter set, generator impedance, and load resistor.
z_params_op_characteristics: Calculate operational characteristics for two-port circuit specified by Z parameter set, generator impedance, and load resistor.
y_params_op_characteristics: Calculate operational characteristics for two-port circuit specified by Y parameter set, generator impedance, and load resistor.
a_params_op_characteristics: Calculate operational characteristics for two-port circuit specified by A parameter set, generator impedance, and load resistor.

Physical AC equivalent circuit

phys_params_voltage_gain: Calculate voltage gain for two-port circuit specified by physical parameter set for common emitter circuit and load resistor.
phys_params_input_impedance: Calculate input impedance for two-port circuit specified by physical parameter set for common emitter circuit and load resistor.
phys_params_output_impedance: Calculate output impedance for two-port circuit specified by physical parameter set for common emitter circuit and generator impedance.
phys_params_current_gain: Calculate current gain for two-port circuit specified by physical parameter set for common emitter circuit and load resistor.
phys_params_op_characteristics: Calculate voltage gain, input impedance, output impedance, and current gain for two-port circuit specified by physical parameter set for common emitter circuit, generator impedance, and load resistor.

two-port parameter set conversions

Conversion between H, Z, Y, K, and A parameters

The following function convert a two-port circuits parameter set into another parameter set:

Function	Conversion
h_params_to_z	H → Z
h_params_to_y	H → Y
h_params_to_a	H → A
h_params_to_k	H → K
z_params_to_h	Z → H
z_params_to_y	Z → Y
z_params_to_a	Z → A
z_params_to_k	Z → K
y_params_to_h	Y → H
y_params_to_z	Y → Z
y_params_to_a	Y → A
y_params_to_k	Y → K
a_params_to_h	A → H
a_params_to_z	A → Z
a_params_to_y	A → Y
a_params_to_k	A → K
k_params_to_h	K → H
k_params_to_z	K → Z
k_params_to_y	K → Y
k_params_to_a	K → A

H parameter set conversion for common emitter, common collector, and common base circuits

The following functions convert a H parameter set for one common transistor port into a H parameter set for another common transistor port:

Function	Conversion
h_params_ce_to_cc	Common emitter → Common collector
h_params_ce_to_cb	Common emitter → Common base
h_params_cc_to_ce	Common collector → Common emitter
h_params_cc_to_cb	Common collector → Common base
h_params_cb_to_ce	Common base → Common emitter
h_params_cb_to_cc	Common base → Common collector

Ratio to dB and vice versa conversions

ratio_to_dB: Calculate dB value for voltage or current gain ratio.
power_ratio_to_dB: Calculate dB value for power gain ratio.
power_dB_to_ratio: Calculate power gain ratio for dB value.
dB_to_ratio: Calculate voltage or current gain ratio for dB value.

Parallel impedances

parallel_impedance: Calculate resulting impedance of a parallel circuit of impedances.

Rounding

round_leading_digits: Round numeric values, keep specified number of leading digits.