Integrated circuit using a power supply input for digital logic
First Claim
1. A method for selecting an operational mode of an electronic device, comprising steps of:
- receiving a first voltage input having a first first voltage state or a second first voltage state, a second voltage input having a first second voltage state or a second second voltage state, and a third voltage input having a first third voltage state or a second third voltage state;
operating a first circuit with power drawn from said first voltage input only when said first voltage input has said first first voltage state;
operating a second circuit with power drawn from said second voltage input only when said second voltage input has said first second voltage state and said first voltage input has said first first voltage state; and
operating a third circuit with power drawn from said second voltage input only when said second voltage input has said first second voltage state and either of said first voltage input has said first first voltage state and said third voltage input has said first third voltage state.
1 Assignment
0 Petitions
Accused Products
Abstract
A GPS receiver including an RF GPS integrated circuit downconverter having a standby mode controlled by a power supply input used as a logic signal. The RF GPS integrated circuit includes a synthesizer for generating LO signals, first and second downconverters for using the LO signals for downconverting the GPS signal, and a sampler for using a clock signal for providing in-phase and quadrature phase sampled output signals representative of the GPS signal. The synthesizer includes a multi-mode divider for providing substantially the same first LO frequency at about the midpoint of the L1 and L2 GPS frequencies when either of an external or internally generated reference frequency is selected. A GPS digital signal processor integrated circuit issues the logic signal and the clock signal from a single pin.
-
Citations
14 Claims
-
1. A method for selecting an operational mode of an electronic device, comprising steps of:
-
receiving a first voltage input having a first first voltage state or a second first voltage state, a second voltage input having a first second voltage state or a second second voltage state, and a third voltage input having a first third voltage state or a second third voltage state; operating a first circuit with power drawn from said first voltage input only when said first voltage input has said first first voltage state; operating a second circuit with power drawn from said second voltage input only when said second voltage input has said first second voltage state and said first voltage input has said first first voltage state; and operating a third circuit with power drawn from said second voltage input only when said second voltage input has said first second voltage state and either of said first voltage input has said first first voltage state and said third voltage input has said first third voltage state. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. An electronic apparatus having selected operational modes, comprising:
-
a first circuit for receiving a first voltage input having a first first voltage state or a second first voltage state and operating with power drawn from a first voltage input only when said first voltage input has said first first voltage state; a second circuit for receiving said first voltage input and a second voltage input having a first second voltage state or a second second voltage state, and for operating with power drawn from said second voltage input only when said second voltage input has said first second voltage state and said first voltage input has said first first voltage state; and a third circuit for receiving said first voltage input, said second voltage input, and a third voltage input having a first third voltage state or a second third voltage state; and
for operating with power drawn from said second voltage input only when said second voltage input has said first second voltage state and either of said first voltage input has said first first voltage state and said third voltage input has said first third voltage state. - View Dependent Claims (9, 10, 11, 12, 13, 14)
-
Specification