Slide type variable resistor

A variable resistor comprising:

• a first resistor having a linear resistance or attenuation characteristic, and including a first end and a second and with a predetermined resistance between said first and said second ends;
• a second resistor disposed along said first resistor and having a linear resistance or attenuation characteristic, said second resistor including a first end and a second end with a predetermined resistance between said first and said second ends;
• a slider for bridging said first and second resistors at locations intermediate said first and said second ends of said first and second resistors, said first end of each of said first and second resistors being connected, and further comprising intermediate taps provided at predetermined locations along said first resistor, which taps are adapted to be connected to said first end of said first and second resistors through resistor means;
• wherein said intermediate taps are two in number and are respectively located at 50% and 70% of a shift amount of said slider between said first and second ends of each of said first and second resistors.

A variable resistor circuit for use as a volume control for an audio signal, comprising:

• an output terminal;
• an input terminal to which said audio signal is input;
• a reference potential terminal;
• a first resistor having a first end connected to said reference potential terminal and a second end to said input terminal, said first resistor having a first predetermined resistance between said first and second ends of said first resistor;
• a second resistor having a first end connected to said first end of said first resistor and to said reference potential terminal and a second end connected to said output terminal, said second resistor having a second predetermined resistance lower than said first predetermined resistance, between said first and said second ends of said second resistor;
• and
• a slide member interconnecting said first and said second resistors at locations between said first and said second ends of said first and said second resistors and arranged to slide along said first and second resistors between said first and said second ends, respectively, said first and second predetermined resistances being selected whereby said variable resistor circuit has an overall attenuation characteristic wherein the degree of attenuation when said slide member is at its 50% shift position is sufficient to accurately control the volume of said audio signal.

A variable resistor circuit, comprising:

• an output terminal;
• an input terminal;
• a reference potential terminal;
• a first resistor having a first end connected to said reference potential terminal and a second end to said input terminal, said first resistor defining a predetermined resistance between said first and said second ends of said first resistor;
• a second resistor having a first end connected to said first end of said first resistor and to said reference potential terminal and a second end connected to said output terminal, said second resistor defining a predetermined resistance between said first and said second ends of said second resistor;
• and
• a slide member interconnecting said first and said second resistors at locations between said first and said second ends of said first and said second resistors and arranged to slide along said first and said second resistors between said first and said second ends, respectively;
• and
• further including a first and second intermediate terminal, and a first and second intermediate tap on said first resistor at positions corresponding to 50% and 70% of the shift amount of the slide member, said first and said second intermediate taps being respectively connected to said first and said second intermediate terminals.