-
-
-
-
Voltage =
Resistance x Current
-
Current =
Voltage / Resistance
-
Resistance =
Voltage / Current
-
Power =
Voltage x Current
-
-
-
-
-
-
Total Resistance of Series circuit =
Sum of individual Resistances
-
Current through a series circuit =
Constant
-
The sum of the individual voltage drops around a series circuit =
The total applied voltage
-
The total resistance of a parallel circuit =
- The reciprocals of the individual resistances.
- RT = 1/(1/R1+1/R2+1/R3)
-
Voltage in a parallel circuit =
Constant across each component of the circuit.
-
Total current in a parellel circuit =
The sum of the individual branch currents
-
Impedance is the combined effect of:
- Resistance
- Compacitive Reactance (Xc)
- Inductive Reactance (XL)
-
Capacitive Reactance is measured in ohms and (increases, decreases) as frequency increases.
Decreases
-
Inductive Reactance is measured in ohms and (increases, decreases) as frequency increases.
Increases
-
Impedance specifications on loudspeakeres and audio inputs and outputs are specified at a frequency of...
1KHz
-
Most devices utilize ____ voltage.
DC
-
Power supplies step down the incoming ____ voltage and convert it to ____ voltage.
-
Power Supplies that are found in older equipment, are less efficient, easier to service, less complex, more expensive, and more reliable.
Linear Power Supply
-
Power supplies that are found in almost all new devices, are more efficient, more complex and difficult to repair, less expensive, smaller, and less reliable.
Switching Power Supply
-
-
A _______ steps down (or up) incoming ___ voltage to a little in excess.
-
-
-
Provides means of adjusting the resistance within a circuit
Potentiometers
-
Opposes a change in current
Inductor
-
-
Gain expressed in dB:
dB gain = 20 Log (V out / V in)
-
% Total Harmonic Distortion
Square root of the sum of the squares of the individual harmonic distortion values.
%THD = √[(%2nd)^2+(%3rd)^2...]
-
When communicating either Sound Pressure Level or Voltage in dB, the following formula should be used:
20 Log (Voltage measured / Voltage reference)
-
When communicating Power in dB, the following formula should be used:
10 Log (Power measured/ Power reference)
-
Doubling of voltage = ___ dB
Doubling of power = ___ dB
-
-
-
dBm reference =
1 Milliwatt
-
Of the semiconductor material types, the ___ type has a deficiency of electrons whereas the ___ type has an abundance of electrons
-
Opposes current flow in one direction and allows it to flow readily in the opposite direction
Diode
-
-
-
Identify this device and its elements:
Vacuum Tube Triode
-
The maximum current flow through the plate of a vacuum tube is called...
Saturation
-
The minimum current flow through the plate of a vacuum tube is called...
Cutoff
-
The fixed ___ voltage applied to the grid of a vacuum tube is referred to as...
the bias voltage
-
Class ___ means the tube or transistor is operating during the full 360 degree cycle of the input signal.
A
-
______ are high gain voltage amplifiers with a differential input and usually a single-ended (unbalanced) output.
Op amps
-
-
Op amps require what kind of power supply?
Bipolar
-
The gain factor from op amps =
Feedback resistor / input resistor
-
Op amps have a very _____ input impedance and a very _____ output impedance.
-
The rule of thumb for good voltage (signal) transfer is the ______ Z should be on the order of ___x the _______ Z
-
________ pass high frequencies more readily than lower frequencies.
Capacitors
-
_______ pass lower frequencies more readily than higher frequencies.
Inductors
-
-
-
-
-
Two signals of identical amplitude and phase applied to a differential (balanced) input
Common Mode
-
Two signals of opposite polarity applied to a differential input.
Differential Mode
-
An input having both a Hi(+) and Lo(-) signal input relative to ground that detects only the difference in voltage at the respective inputs.
Differential Input
-
-
-
Name the parts:
-
|
|
