1. A flexible container (10) comprising:
a base portion (12) including a bottom (20), side walls (22, 24, 26, 28), defining an interior (30), the bottom defining a substantially flat planar surface when the container rests on it in use; and
an upper panel (14) comprising side panels (46, 48, 50, 52) corresponding with side walls (22, 24, 26, 28) of the base portion, the side panels having respective lower portions, that extend partially below an upper end of the base portion to be sealingly bonded thereto, and upper portions forming an opening providing access to the interior (30),
two opposite side panels having upper ends provided with resealable closure members (60, 62),
the upper panel (14) being constructed and arranged to define a substantially flat top surface (72) in operatively closed configuration, said top surface rendering the container stackable with other like containers when the upper panel is closed and portions of the upper panel are folded.
2. The container of claim 1 further comprising:
a pair of handles (16, 18) coupled to the base portion.
3. The container of claim 2 wherein each of the pair of handles is bonded to a separate side wall (24, 28) of the base portion.
4. The flexible container of claim 3 wherein the pair of handles and upper panel are each thermally sealed to the interior of the base portion.
5. The flexible container according to any one of the preceding claims wherein the container in a closed position has a substantially cubic-shape.
6. The flexible container according to any one of claims 1 to 4 wherein the container in a closed position has a substantially triangular shape.
7. The flexible container according to any one of the preceding claims wherein the closure members (60, 62) are resealable.
8. The flexible container according to any one of the preceding claims wherein the closure members includes a ziplock closure.
9. The flexible container according to any one of claims 1 to 7 wherein the closure members include a hook and loop closure.
10. The flexible container according to any one of claims 1 to 8 wherein the closure members include a zipper closure.
11. The flexible container according to any one of claims 1 to 7 wherein the closure members include an adhesive closure.
12. The flexible container according to any one of claims 1 to 7 wherein the closure members include an cohesive closure.
14. The flexible container according to any one of claims 3 to 13 wherein a portion of the handles extends above the upper panel after the container is closed.
15. The flexible container according to any one of the preceding claims where the base includes triangular sections (34, 36) that extend from the bottom of the base.
16. A flexible container (10) comprising:
a base portion (12) including a bottom (20), side walls (22, 24, 26, 28) and an open interior (30), the side walls being defined by at least two sheets of flexible material sealed along two edges and defining two side seams (29, 31) located on opposite sides of the base (12);
an upper panel (14) including side panels (46, 48, 50, 52) having respective lower end portions to be received within the interior of the base portion and sealed to an upper portion thereof thereto, opposite side panels having end portions that define resealable closure members (60, 62), and being foldable to close the interior and to define a substantially flat surface (72) when the container is in operatively closed configuration; and
a pair of handles (16, 18) secured to the base portion.
17. The flexible container of claim 16 wherein the base includes two triangular portions (34, 36) extending from the bottom to a side seam.
18. The flexible container of claim 16 or claim 17 wherein the triangular portions are adaptable in use to form a cavity between the interior (34a, 36a) and exterior triangular sections, such cavity providing a hand-hold to the user.
19. The flexible container according to any one of claims 16 to 18 wherein the pairs of handles and upper panel are each thermally sealed to the interior of the base portion.
20. The flexible container according to any one of claims 16 to 19 wherein the closure member includes a hook and loop closure.
30. A method of making a flexible container (30) having a base portion (12), the method comprising the steps of:
providing a flat sheet of plastic material having a width substantially equal to a length of the base portion;
indexing the flat sheet in intervals equal to at least a width of the base portion;
bonding a pair of handles to the flat sheet;
providing a pair of panels;
bonding each of the pair of panels to the flat sheet and one of the pair of handles;
supplying closure means to a free end of each of the pair of panels; and
forming the flat sheet, pair of panels and pair of handles into the flexible container.
31. The method of making the flexible container of claim 30 further comprising the step of:
applying a peel seal near each end of the flat sheet, each peel seal extending the width of the base portion;
32. The method of making the flexible container of claim 30 or claim 31 wherein the step of bonding each of the pair of panels to the flat sheet and one of the pair of handles is through a thermal bonding process and provides a hermetic seal.
33. The method of making the flexible container according to any one of claims 30 to 32 wherein the step of providing the flat sheet of plastic material is via a web roll.
34. The method of making the flexible container according to any one of claims 30 to 33 wherein the step of forming the flexible container provides a substantially cubic-shaped container.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An integrated circuit radio transceiver, comprising:
transceiver circuitry for receiving and transmitting RF signals;
a multiple input programmable Continuous-Time Delta-Sigma Analog-to-Digital Converter (CT\u0394\u03a3ADC) coupled to receive an analog signal from a selected source within the transceiver circuitry, the CT\u0394\u03a3ADC for producing digital data based on the received analog signal, wherein the CT\u0394\u03a3ADC includes:
a programmable input block operably coupled to receive the analog signal and to produce a scaled analog signal;
at least one integrator operably coupled to receive the scaled analog signal to produce at least one integrated output;
a quantizer operably coupled to receive the at least one integrated output and for producing a digital output having a digital value coarsely reflecting an amplitude of the analog signal;
at least one programmable digital-to-analog converter (DAC) operably coupled to receive and to convert the quantizer digital output to an analog programmable feedback current coupled to an integrator input;
a programmable bias current block operably coupled to the integrator input to produce a programmable bias current to substantially cancel a bias voltage component of the received analog signal; and
logic operably coupled to select an offset bias voltage level to the CT\u0394\u03a3ADC based on at least one of a received analog signal input magnitude and an offset bias voltage component of the received analog signal.
2. The integrated circuit radio transceiver of claim 1 wherein the programmable input block comprises a selectable value input resistive element operably coupled to receive the analog signal and to produce an input current to the integrator input, wherein the input current is proportional to the received analog signal.
3. The integrated circuit radio transceiver of claim 2 wherein the selectable value input resistive element comprises one of a resistor and a transistor.
4. The integrated circuit radio transceiver of claim 1 wherein the programmable bias current block comprises a variable bias resistive element operably coupled to the integrator input and to a first digital switch, wherein the first digital switch is selectively controlled to couple the variable bias resistive element to one of a supply voltage and to a circuit common.
5. The integrated circuit radio transceiver of claim 4 wherein the first digital switch and the variable bias resistive element are operably controlled by the logic.
6. The integrated circuit radio transceiver of claim 5 wherein the logic comprises a digital processor.
7. The integrated circuit radio transceiver of claim 1 wherein the at least one programmable DAC comprises a variable feedback resistive element operably coupled to the integrator input and to a second digital switch, wherein the second digital switch is selectively controlled by the logic to couple the variable feedback resistive element to one of a supply voltage and to a circuit common.
8. The integrated circuit radio transceiver of claim 7 wherein the variable feedback resistive element’s value is selected to produce a programmable feedback current magnitude that substantially cancels a quantization noise component present in the quantizer digital output.
9. A method for producing a programmable input range Continuous-Time Delta-Sigma Analog-to-Digital Converter (CT\u0394\u03a3ADC), the method comprising:
receiving an analog signal at an input of the CT\u0394\u03a3ADC;
producing a scaled input current based on the received analog signal, wherein the scaled input current substantially matches a full scale input of the CT\u0394\u03a3ADC;
generating a bias current that substantially cancels an offset bias current component of the scaled input current;
integrating the scaled input current to produce an integrated signal representing a time averaged value of the scaled input current to substantially remove noise from a frequency band of interest;
coupling the integrated signal to a quantizer to produce a digital representation of a scaled analog signal; and
coupling the digital representation of the scaled analog signal to a digital-to-analog converter (DAC) to produce a feedback current that substantially cancels a quantization noise component in the digital representation of the scaled analog signal.
10. The method of claim 9 wherein producing the scaled input current comprises selecting and coupling a programmable input resistance value between the CT\u0394\u03a3ADC input and an integrator input.
11. The method of claim 9 wherein generating the bias current comprises selecting and coupling a variable bias resistance value between the integrator input and one of a supply voltage and a circuit common.
12. The method of claim 9 wherein producing the feedback current comprises coupling the digital representation of the scaled analog signal to a programmable digital switch wherein the programmable digital switch either sinks current from or sources current to the integrator input.
13. The method of claim 12 wherein a magnitude of the digital switch current is selected by a programmable feedback resistance operably coupled by the programmable digital switch to one of a supply voltage or a circuit common.
14. A programmable input range Continuous-Time Delta-Sigma Analog-to-Digital Converter (CT\u0394\u03a3ADC), comprising:
a programmable input block operably coupled to receive an analog signal and to produce a scaled analog signal;
at least one integrator operably coupled to receive the scaled analog signal to produce at least one integrated output;
a quantizer operably coupled to receive the at least one integrated output and for producing a digital output having a digital value coarsely reflecting an amplitude of the analog signal;
at least one programmable digital-to-analog converter (DAC) operably coupled to receive and to convert the quantizer digital output to an analog programmable feedback current coupled to an integrator input;
a programmable bias current block operably coupled to the integrator input to produce a programmable bias current to substantially cancel a bias voltage component of the received analog signal; and
logic operably coupled to select an offset bias voltage level to the CT\u0394\u03a3ADC based on at least one of a received analog signal input magnitude and an offset bias voltage component of the received analog signal.
15. The CT\u0394\u03a3ADC of claim 14 wherein the programmable input block comprises a selectable value input resistive element operably coupled to receive the analog signal and to produce an input current to the integrator input, wherein the input current is proportional to the received analog signal.
16. The CT\u0394\u03a3ADC of claim 15 wherein the selectable value input resistive element comprises one of a resistor and a transistor.
17. The CT\u0394\u03a3ADC of claim 14 wherein the programmable bias current block comprises a variable bias resistive element operably coupled to the integrator input and to a first digital switch, wherein the first digital switch is selectively controlled to couple the variable bias resistive element to one of a supply voltage and to a circuit common.
18. The CT\u0394\u03a3ADC of claim 17 wherein the first digital switch and the variable bias resistive element are operably controlled by the logic.
19. The CT\u0394\u03a3ADC of claim 18 wherein the logic comprises a digital processor.
20. The CT\u0394\u03a3ADC of claim 14 wherein the at least one programmable DAC comprises a variable feedback resistive element operably coupled to the integrator input and to a second digital switch, wherein the second digital switch is selectively controlled by the logic to couple the variable feedback resistive element to one of a supply voltage and to a circuit common.
21. The CT\u0394\u03a3ADC of claim 20 wherein the variable feedback resistive element’s value is selected to produce a programmable feedback current magnitude that substantially cancels a quantization noise component present in the quantizer digital output.