Differential-to-CMOS level converter having cross-over voltage adjustment
First Claim
1. A differential-to-CMOS level converter comprising:
- a conversion circuit having first and second differential inputs and first and second complementary outputs; and
a cross-over adjustment circuit having first and second cross-over voltage measurement inputs coupled to the first and second complementary outputs and having first and second offset current outputs coupled to the first and second complementary outputs, respectively.
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Abstract
A differential-to-CMOS level converter includes a differential-to-CMOS conversion circuit, first and second buffers and a cross-over adjustment circuit. The conversion circuit has first and second differential input terminals and first and second complementary output terminals. The first buffer has a buffer input coupled to the first complementary output and has a buffer output. The second buffer has a buffer input coupled to the second complementary output and has a buffer output. The cross-over adjustment circuit has first and second voltage measurement inputs coupled to the first and second buffer outputs and has first and second offset current outputs coupled to the first and second buffer inputs, respectively.
82 Citations
14 Claims
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1. A differential-to-CMOS level converter comprising:
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a conversion circuit having first and second differential inputs and first and second complementary outputs; and a cross-over adjustment circuit having first and second cross-over voltage measurement inputs coupled to the first and second complementary outputs and having first and second offset current outputs coupled to the first and second complementary outputs, respectively. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A integrated circuit comprising:
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first and second supply terminals; a differential-to-CMOS converter coupled between the first and second supply terminals and having first and second differential inputs and first and second complementary outputs; and a cross-over adjustment circuit having first and second cross-over voltage measurement inputs coupled to the first and second complementary outputs, respectively, and having first and second offset current outputs coupled to the first and second complementary outputs, respectively. - View Dependent Claims (13)
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14. A method of adjusting a cross-over voltage of first and second complementary outputs of a differential-to-CMOS level converter, the method comprising:
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generating first and second buffered outputs as a function of the first and second complementary outputs, respectively; measuring a cross-over voltage of the first and second buffered outputs; comparing the cross-over voltage to a reference voltage; sourcing current into the first and second complementary outputs if the cross-over voltage is below the reference voltage; and sinking current from the first and second complementary outputs if the cross-over voltage is above the reference voltage.
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Specification