US 2013/0181295 A1 · ANALOG SIGNAL COMPATIBLE CMOS SWITCH AS AN INTEGRATED PERIPHERAL TO A STANDARD MICROCONTROLLER

Abstract

At least one analog signal compatible complementary metal oxide semiconductor (CMOS) switch circuit is incorporated with digital logic circuits in an integrated circuit. The integrated circuit may further comprise a digital processor and memory, e.g., microcontroller, microprocessor, digital signal processor (DSP), programmable logic array (PLA), application specific integrated circuit (ASIC), etc., for controlling operation of the at least one analog signal compatible CMOS switch for switching analog signals, e.g., audio, video, serial communications, etc. The at least one analog signal compatible CMOS switch may have first and second states, e.g., single throw “on” or “off”, or double throw common to a or b, controlled by a single digital control signal of either a logic “0” or a logic “1”.

Claims20

Dependent claims

An integrated circuit device, comprising:

a digital processor;
a memory coupled to the digital processor;
and
at least one analog signal compatible single pole single throw complementary metal oxide semiconductor (CMOS) switch coupled to and controlled by the digital processor, wherein the at least one analog signal compatible single pole single throw CMOS switch has
a low impedance between a first node and a second node when the digital processor asserts a control signal at a first logic level thereto, and
a high impedance between the first node and the second node when the digital processor asserts the control signal at a second logic level thereto.

3 more elements

An integrated circuit device, comprising:

a digital processor;
a memory coupled to the digital processor;
and
at least one analog signal compatible single pole complementary metal oxide semiconductor (CMOS) switch coupled to and controlled by the digital processor, wherein the at least one analog signal compatible single pole CMOS switch has
a high impedance between a first node and a second node and a low impedance between the first node and a third node when the digital processor asserts control signals at first logic levels thereto,
a high impedance between the first node and the second node and a high impedance between the first node and the third node when the digital processor asserts control signals at second logic levels thereto,
a low impedance between the first node and the second node and a low impedance between the first node and the third node when the digital processor asserts control signals at third logic levels thereto, and
a low impedance between the first node and the second node and a high impedance between the first node and the third node when the digital processor asserts control signals at fourth logic levels thereto.

5 more elements

Dependencies are inferred from the claim text.

Analog signal compatible cmos switch as an integrated peripheral to a standard microcontroller

Life of this patent

Analog signal compatible cmos switch as an integrated peripheral to a standard microcontroller

Life of this patent

Abstract

Claims20