Cellular handset with adjustable analog to digital conversion
First Claim
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1. A cellular communications handset comprising:
- a receiver operable to receive radio signals and to convert them into electrical signals;
an analog to digital converter coupled to the receiver, the analog to digital converter converting an analog input to a digital output having an adjustable number of bits at an adjustable sampling frequency, the analog to digital converter further comprising;
two or more one-bit stages, the first stage configured to process high current signals, each successive stage configured to process signals having lower current than the preceding stage, and wherein the cellular telephone application specific integrated circuit is operable to adjust the sampling frequency and number of bits sampled by the analog to digital converter by selecting an input that bypasses the first stage and a predetermined number of successive stages; and
a cellular telephone application specific integrated circuit coupled to the analog to digital converter, the cellular telephone application specific integrated circuit operable to process the digital output to extract encoded telecommunications data.
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Abstract
A cell phone is provided that may be used with multiple radio formats, such as GSM and CDMA. The cell phone includes a receiver that receives radio signals and converts them into electrical signals. An analog to digital converter is connected to the receiver and converts an analog input to a digital output having an adjustable number of bits at an adjustable sampling frequency. A cell phone application specific integrated circuit is connected to the analog to digital converter, which is used to process the digital output to extract encoded telecommunications data in one of the supported radio formats.
47 Citations
16 Claims
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1. A cellular communications handset comprising:
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a receiver operable to receive radio signals and to convert them into electrical signals;
an analog to digital converter coupled to the receiver, the analog to digital converter converting an analog input to a digital output having an adjustable number of bits at an adjustable sampling frequency, the analog to digital converter further comprising;
two or more one-bit stages, the first stage configured to process high current signals, each successive stage configured to process signals having lower current than the preceding stage, and wherein the cellular telephone application specific integrated circuit is operable to adjust the sampling frequency and number of bits sampled by the analog to digital converter by selecting an input that bypasses the first stage and a predetermined number of successive stages; and
a cellular telephone application specific integrated circuit coupled to the analog to digital converter, the cellular telephone application specific integrated circuit operable to process the digital output to extract encoded telecommunications data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A cellular communications system comprising:
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one or more first cellular base stations transmitting and receiving in a first cellular communications format;
one or more second cellular base stations transmitting and receiving in a second cellular commutations format;
a plurality of cellular handsets, each cellular handset having an adjustable analog to digital converter, at least one of the cellular handsets further comprising a receiver receiving radio signals and converting them into electrical signals, an analog to digital converter coupled to tie receiver, the analog to digital converter converting an analog input to a digital output having an adjustable number of bits at an adjustable sampling frequency, the analog to digital converter further comprising;
Two or more n-bit stages; and
a cellular telephone application specific integrated circuit coupled to the analog to digital converter, the cellular telephone application specific integrated circuit operable to process the digital output to extract encoded telecommunications data; and
wherein each of the cellular handsets is operable to transmit and receive the first cellular communications format by selecting a fit analog to digital converter setting, and to transmit and receive the second cellular communications format by selecting a second analog to digital converter setting. - View Dependent Claims (10, 11, 12)
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13. A cellular communications handset comprising:
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a receiver receiving radio signals and converting them into electrical signals;
an analog to digital converter coupled to the receiver, the analog to digital converter converting an analog input to a digital output having an adjustable number of bits at an adjustable sampling frequency, the analog to digital converter further comprising;
two or more n-bit stages; and
a cellular telephone application specific integrated circuit coupled to the analog to digital converter, the cellular telephone application specific integrated circuit operable to process the digital output to extract encoded telecommunications data. - View Dependent Claims (14, 15, 16)
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Specification