Automatic activation of continuous glucose monitor (CGM) transmitter

Abstract

A battery-operated electronic device, such as a continuous glucose monitoring (CGM) transmitter, has a switch-off circuit that reduces battery drain when the device is stored and / or in "shelf mode." The device has two externally accessible activation pads, each configured to contact the same electrical conductor located in the device's packaging, thereby causing the switch-off circuit to disconnect the battery from the device electronics when the device is in the packaging. Upon removal of the device from the packaging, the two activation pads no longer contact the electrical conductor, thereby causing the switch-off circuit to automatically connect the battery to the device electronics. Methods and other aspects of reducing battery drain in a battery-operated electronic device are also described.

Description

[0001] Related applications

[0002] This application claims priority to and the benefit of U.S. Provisional Patent Application No. 62 / 901,976, filed on September 18, 2019, entitled “AUTOMATIC ACTIVATION OF CONTINUOUS GLUCOSE MONITORING (CGM) TRANSMITTER,” which is incorporated herein by reference in its entirety for all purposes. Technical Field

[0003] The present disclosure relates to wireless transmitters for continuous glucose monitoring systems. Background Art

[0004] Continuous analyte sensing in in vivo and / or in vitro samples, such as continuous glucose monitoring (CGM), has become a routine sensing procedure, especially in diabetes care. By providing real-time glucose concentrations, therapeutic / clinical measures can be applied more promptly and glycemic conditions can be better controlled.

[0005] During CGM operation, the biosensor is typically inserted subcutaneously and operates continuously in an environment surrounded by tissue and tissue fluid. The biosensor inserted under the skin provides a signal to the wireless CGM transmitter of the CGM sensor device, and the signal indicates the user's blood glucose level. These measurements can be taken automatically multiple times throughout the day (e.g., every few minutes or at some other interval).

[0006] The wireless CGM transmitter is typically adhered to the outer surface of the user's skin, such as on the abdomen or behind the upper arm, while the biosensor is inserted through the skin to contact interstitial fluid.

[0007] Wireless CGM transmitters are typically battery-operated devices that may be stored and / or left on a store or warehouse shelf ("shelf mode") for an extended period of time before a user begins using it. Although some conventional CGM transmitters may be packaged in a low-power mode, significant battery discharge may still occur during storage or shelf mode. Other conventional CGM transmitters may have an electromechanically activated switch that is initially set to disconnect the battery from the CGM electronics in order to conserve battery power during storage or shelf mode. However, given the size of the switch and the need to be sealed, such a switch disadvantageously increases the bulk and cost of the CGM transmitter. Furthermore, such conventional CGM transmitters rely on the user to activate the transmitter by resetting the activation switch in order to connect the battery to the CGM electronics.

[0008] Therefore, there is a need for improved wireless CGM transmitters and methods of reducing battery discharge and activating CGM transmitters while in storage and / or shelf mode. Summary of the Invention

[0009] According to a first aspect, a method of reducing battery discharge in a wireless continuous glucose monitoring (CGM) transmitter comprises: receiving the CGM transmitter in a package configured to receive and enclose the CGM transmitter therein; automatically electrically disconnecting a battery of the CGM transmitter from transmitter electronics of the CGM transmitter in response to the CGM transmitter being received in the package; and automatically electrically connecting the battery to the transmitter electronics in response to the CGM transmitter being removed from the package.

[0010] According to a second aspect, a wireless continuous glucose monitoring (CGM) transmitter includes a first activation pad and a second activation pad, transmitter electronics, and a battery, the battery having a positive terminal and a negative terminal, wherein the negative terminal is coupled to the first activation pad. The CGM transmitter also includes a switch disconnect circuit having an input pin, an output pin, and an enable pin, wherein the input pin is coupled to the positive terminal of the battery, the output pin is coupled to a power input of the transmitter electronics, and the enable pin is coupled to the second activation pad. The switch disconnect circuit is configured to electrically disconnect the battery from the transmitter electronics in response to the first activation pad being electrically connected to the second activation pad.

[0011] According to a third aspect, a method for reducing battery discharge in a wireless continuous glucose monitoring (CGM) transmitter includes coupling an input of a switch disconnect circuit to a positive terminal of a battery and coupling an output of the switch disconnect circuit to a power input of transmitter electronics of the CGM transmitter. The method also includes coupling a first activation pad to a negative terminal of the battery and a second activation pad to an enable pin of the switch disconnect circuit. The method also includes packaging the CGM transmitter in a package including an electrical conductor positioned to contact both the first activation pad and the second activation pad, thereby causing the switch disconnect circuit to disconnect the battery from the transmitter electronics.

[0012] According to a fourth aspect, a battery-operated electronic device includes first and second activation pads, device electronics, and a battery, the battery having a positive terminal and a negative terminal, wherein the negative terminal is coupled to the first activation pad. The battery-operated electronic device further includes a switch disconnect circuit having an input pin, an output pin, and an enable pin, wherein the input pin is coupled to the positive terminal of the battery, the output pin is coupled to a power input of the device electronics, and the enable pin is coupled to the second activation pad. The switch disconnect circuit is configured to electrically disconnect the battery from the device electronics in response to the first activation pad being electrically connected to the second activation pad.

[0013] Still other aspects, features, and advantages of the present disclosure may be apparent from the following description and illustration of a number of exemplary embodiments and implementations, including the best mode contemplated for carrying out the invention. The present disclosure is also capable of other and different embodiments, and its several details may be modified in various respects, all without departing from the scope of the invention. For example, some embodiments of the present disclosure may be applicable to providing users with other battery-operated electronic devices that include batteries. Such battery-operated electronic devices may include various gaming, music, video, communication, and / or computer devices, and / or combinations thereof. The present disclosure is intended to cover all modifications, equivalents, and alternatives that fall within the scope of the appended claims (see further below). BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings described below are for illustrative purposes and are not necessarily drawn to scale. Therefore, the accompanying drawings and descriptions are to be regarded as illustrative rather than restrictive in nature. The accompanying drawings are not intended to limit the scope of the present invention in any way.

[0015] Figure 1 A schematic diagram illustrating a wireless continuous glucose monitoring (CGM) transmitter received in a CGM transmitter package in accordance with one or more embodiments.

[0016] Figure 2A A bottom view of a CGM transmitter is shown in accordance with one or more embodiments.

[0017] Figure 2B shows a method according to one or more embodiments Figure 2A Side view of the CGM transmitter and CGM transmitter packaging (with the side panel removed).

[0018] Figure 2C shows receiving a Figure 2B A side view of the CGM transmitter in the CGM transmitter packaging (with the side panel removed).

[0019] Figure 2D shows receiving a Figure 2C Front view of the CGM transmitter in the CGM transmitter packaging (with the front panel removed).

[0020] Figure 3 A schematic diagram is shown of transmitter electronics of a CGM transmitter coupled to a CGM sensor assembly according to one or more embodiments.

[0021] Figure 4 A simplified side view of a CGM sensor device is shown in accordance with one or more embodiments.

[0022] Figure 5 A flow chart illustrating a method of reducing battery discharge in a CGM transmitter according to one or more embodiments is shown.

[0023] Figure 6 A flow chart illustrating another method of reducing battery discharge in a CGM transmitter according to one or more embodiments is shown. DETAILED DESCRIPTION

[0024] Battery-operated electronic devices that include one or more batteries may sit on a store or warehouse shelf (which may be referred to as "shelf mode") for months before use. These electronic devices, even those that are initially set up in a low-power mode, may experience significant battery discharge while in shelf mode. In one or more embodiments described herein, a battery-operated electronic device that may be, for example, a wireless continuous glucose monitoring (CGM) transmitter may include a switch disconnect circuit that, along with packaging configured to receive and enclose the device therein, significantly reduces battery discharge while the device is stored and / or in shelf mode. Furthermore, a battery-operated electronic device according to one or more embodiments described herein may automatically activate when the device is removed from its packaging.

[0025] The following will combine wireless CGM transmitter and Figure 1-6 These and other features of the battery-operated electronic device of the present invention are described in detail in accordance with one or more embodiments.

[0026] Some conventional battery-operated CGM transmitters are initially configured and packaged in low-power mode. However, these CGM transmitters may still consume battery power. For example, a CGM transmitter's microcontroller in typical low-power mode may still consume 1-2 μA. After 12 months of storage or shelf life, the battery may lose approximately 9-18 mAh. This means there is enough battery power to operate the CGM transmitter for nearly two weeks. Manufacturers typically address battery discharge issues by providing larger, more expensive batteries with sufficient power to compensate for the extended storage and / or shelf life.

[0027] Other conventional battery-operated CGM transmitters can be manufactured without an internal connection between the battery and the transmitter electronics, and instead have two externally accessible conductive pads, one connected to the battery and the other connected to the power input of the transmitter electronics. When attached to a CGM sensor assembly that can be positioned on the user's skin, the electrical connector on the CGM sensor assembly can contact the two conductive pads, thereby electrically connecting the battery to the transmitter electronics. However, a disadvantage of this type of electrical connection is that it is not reliable enough for wearable devices, which are affected by vibrations caused by the user's movement. If the electrical connection between the two conductive pads becomes open (i.e., one or both of the two conductive pads lose contact with the CGM sensor assembly electrical connector), even for a few milliseconds, the CGM transmitter may lose data and may require additional recalibration after power is restored.

[0028] Figure 1 A wireless CGM transmitter 100 and a CGM package 102 configured to receive the CGM transmitter 100 therein are shown according to one or more embodiments. The CGM transmitter 100, when packaged in the CGM package 102, advantageously reduces battery discharge during storage and / or shelf mode and automatically activates when removed from the CGM package 102. Advantageously, once removed from the CGM package 102, the CGM transmitter 100 does not require any electrical connection to any external device, connector, or component, and does not require any other action by the user in order to be powered by its battery.

[0029] The CGM transmitter 100 can provide Bluetooth, WiFi, RF, or other suitable wireless communications. The CGM transmitter 100 can include at least one battery 104, a switch disconnect circuit 106, transmitter electronics 108, a first activation pad 110-A, and a second activation pad 110-B. The battery 104 can have a positive ("+") terminal and a negative ("-") terminal. The negative ("-") terminal of the battery 104 can be coupled to the first activation pad 110-A. The switch disconnect circuit 106 can have an input pin 112, which can be coupled to the positive ("+") terminal of the battery 104, an output pin 114, which can be coupled to a power input 118 of the transmitter electronics 108, and an enable pin 116, which can be coupled to the second activation pad 110-B.

[0030] The switch disconnect circuit 106 may further include a transistor switch 120, a logic gate 122, an inverter 124, a differential amplifier 126 (functioning as a comparator), and a current source 128. The transistor switch 120 may be coupled in series (i.e., in a direction such that current flows through the transistor switch when the transistor switch 120 is on) between the input pin 112 and the output pin 114. The logic gate 122 may have a first input, a second input, and an output, wherein the output may be coupled to a control input of the transistor switch 120 to control the on / off operation of the transistor switch 120. In some embodiments, the transistor switch 120 may include a MOSFET, and more specifically, a P-channel MOSFET, wherein its drain is coupled to the input pin 112, its source is coupled to the output pin 114, and its gate is coupled to the output of the logic gate 122. In embodiments including a P-channel MOSFET, the logic gate 122 may include an OR gate. Alternatively, other types of transistor switches and logic gates may be used. The inverter 124 may be coupled between the enable pin 116 and the first input of the logic gate 122. Differential amplifier 126 may have an inverting input coupled to input pin 112, a non-inverting input coupled to output pin 114, and an output coupled to a second input of logic gate 122. Current source 128 may be coupled between input pin 112 and enable pin 116. In some embodiments, switch disconnect circuit 106 may include a nanopower ideal diode, such as the MAX40203 ideal diode manufactured by Maxim Integrated of San Jose, California.

[0031] The switch disconnect circuit 106 can operate as follows: when the second activation pad 110-B is electrically floating (i.e., not electrically connected to the first activation pad 110-A, ground, or a voltage), the enable pin 116 also electrically floats. In some embodiments, a current source 128 providing approximately 14-16 nA can be provided in response to this, enabling the switch disconnect circuit 106. Specifically, the inverter 124 outputs a logic low signal to the logic (OR) gate 122. The logic (OR) gate 122 also receives the logic low signal from the output of the differential amplifier 126, causing the logic (OR) gate 122 to output the logic low signal to the transistor (P-channel MOSFET) switch 120. The logic low signal received at the control input (gate) of the transistor (P-channel MOSFET) switch 120 turns it on, thereby creating a current path between the input pin 112 and the output pin 114. This connects the battery 104 to the power input 118 of the transmitter electronics 108. In this enable mode, the voltage drop across transistor (P-channel MOSFET) switch 120 may be less than 20 mV in some embodiments.

[0032] When the second activation pad 110-B is electrically connected to the first activation pad 110-A, for example, which is connected to ground (i.e., the negative ("-") battery terminal), the enable pin 116 is also connected to ground, which disables the switch disconnect circuit 106. That is, the inverter 124 outputs a logic HIGH signal to the logic (OR) gate 122, which continues to receive the logic LOW signal from the output of the differential amplifier 126. The logic (OR) gate 122 responds by outputting a logic HIGH signal to the control input (gate) of the transistor (P-channel MOSFET) switch 120, which causes the transistor (P-channel MOSFET) switch 120 to be turned off. As a result, the transistor (P-channel MOSFET) switch 120 is turned on (i.e., no current path exists between the input pin 112 and the output pin 114), which disconnects the battery 104 from the power input 118 of the transmitter electronics 108.

[0033] In this disabled mode, the quiescent current can be approximately 130 nA in some embodiments. During, for example, 12 months of storage and / or shelf mode of the CGM transmitter 100, the battery 104 can discharge only approximately 1.1 mAh (i.e., 130 nA x 24 hours x 365 days) while in this disabled mode. This reduced battery discharge rate is advantageously comparable to the typical self-discharge rate of LiMn batteries.

[0034] To implement the disabled mode when the CGM transmitter 100 is in storage and / or shelf mode, a CGM package 102 may be provided (e.g., by a CGM transmitter manufacturer or packaging provider) that is configured to receive and enclose the CGM transmitter 100 therein. Figure 1 As shown in FIG, the CGM package 102 includes an electrical conductor 130 positioned such that a first activation pad 110-A and a second activation pad 110-B (each externally accessible on an exterior surface of the CGM transmitter 100) both make electrical contact with the electrical conductor 130 when the CGM transmitter 100 is received and enclosed within the CGM package 102. Electrically connecting the first activation pad 110-A to the second activation pad 110-B via the electrical conductor 130 grounds the enable pin 116, which disables the switch disconnect circuit 106 as described above. The electrical conductor 130 may be, for example, a metal plate or conductive carbon rubber and may be positioned within and attached to and / or seated within the CGM package 102 in any conventional manner (e.g., by adhesive or fasteners, or by fitting within a molded insert received within the CGM package 102, etc.). Other conductive materials may be used for the electrical conductor 130.

[0035] Figures 2A-2DA CGM transmitter 200 according to one or more embodiments is shown, which can be the same as or substantially similar to the CGM transmitter 100 and can have a first activation pad 210-A and a second activation pad 210-B that are externally accessible on a bottom surface 211 of the CGM transmitter 200. The first activation pad 210-A and the second activation pad 210-B can be coupled within the CGM transmitter 200 to operate as described above with respect to the first activation pad 110-A and the second activation pad 110-B of the CGM transmitter 100 with respect to connection and disconnection of one or more batteries to the transmitter electronics of the CGM transmitter 200.

[0036] Figures 2B-2D A CGM package 202 is shown, which may be the same as or substantially similar to the CGM package 102 and may be configured to receive and enclose a CGM transmitter 200 therein, according to one or more embodiments.

[0037] like Figures 2B-2DAs shown in FIG, CGM package 202 can be a generally square or rectangular package or box-like structure of conventional cardboard construction having a front panel 232, a back panel 234, a top panel 236, a bottom panel 238, and two side panels 240-A and 240-B. CGM package 202 can also include an electrical conductor 230 attached to the interior of CGM package 202 and / or positioned or seated therein such that, when CGM transmitter 200 is received in CGM package 202, electrical conductor 230 electrically contacts both first activation pad 210-A and second activation pad 210-B. Electrical conductor 230 can be, for example, a metal plate, a conductive carbonized rubber strip, or any other suitable electrical conductor. Electrical conductor 230 can be attached to an interior surface (e.g., the interior surface of bottom panel 238) or internal structure of CGM package 202 in any suitable manner (e.g., via adhesive or fasteners). CGM package 202 can also include a support surface 242 configured to receive a portion of CGM transmitter 200 thereon. The support surface 242 can have the same cardboard construction as the panel of the CGM package 202, or alternatively, can be, for example, a molded and / or bottom insert configured to be received in the CGM package 202 before the CGM transmitter 200. Other types or configurations of the support surface 242 are possible. The CGM package 202 can be configured and constructed, for example, with one or more support surfaces 242 and / or guide structures so that the CGM transmitter 200 can be guided and received in the CGM package 202 in only one orientation, such that the first activation pad 210-A and the second activation pad 210-B both electrically contact the electrical conductor 230 when the CGM transmitter 200 is securely received in the CGM package 202. In other embodiments, the CGM package 202 can have other suitable shapes, constructions, and materials, provided that the CGM transmitter 200 is configured to be received and enclosed therein so that the first activation pad 210-A and the second activation pad 210-B each electrically contact the electrical conductor located within the interior of the CGM package 202.

[0038] Figure 3 300 is shown as wireless transmitter electronics 308 of a CGM transmitter 300 that can be removably coupled to a CGM sensor assembly 344 in accordance with one or more embodiments. Alternatively, in some embodiments, the CGM transmitter 300 and the CGM sensor assembly 344 can be a single integrated unit. The CGM transmitter 300 can be the same as or substantially similar to the CGM transmitters 100 and / or 200, and the transmitter electronics 308 can be the same as or substantially similar to the transmitter electronics 108. The CGM sensor assembly 344 includes sensor electronics and can be configured to communicate with a patient via a sensor component ( Figure 3 Not shown; see Figure 4) continuously obtain glucose readings. The CGM transmitter 300 may include contact pads 346-A, 346-B, and 346-C, each of which is configured to electrically contact the CGM sensor assembly 344 and receive glucose readings therefrom and transmit these readings to the transmitter electronics 308.

[0039] The transmitter electronics 308 may include a power supply (VCC) input 318, a microcontroller 348, an antenna 350, a serial bus 352, and an analog front-end (AFE) circuit 354, and may provide Bluetooth, WiFi, RF, or other suitable wireless communications. The transmitter electronics 308 may provide power to the CGM sensor assembly 344 via power contacts 356. The analog front-end circuit 354 may process the glucose reading (e.g., provide analog-to-digital signal conversion) and transmit the converted signal to the microcontroller 348 via the serial bus 352. The microcontroller 348 may be programmed to further process the converted signal to determine the glucose concentration and transmit the determined glucose concentration to a management unit or suitable computer within range of the CGM transmitter 300 via the antenna 350.

[0040] Figure 4 A CGM sensor device 401 is shown according to one or more embodiments. CGM sensor device 401 includes a wireless CGM transmitter 400, which can be the same as or substantially similar to CGM transmitters 100, 200, and / or 300. CGM sensor device 401 can also include an on-body CGM sensor assembly 444, a sensor component 458, and a sensor cartridge 460. CGM transmitter 400 can be coupled to on-body CGM sensor assembly 444 in any conventional manner and can be powered from one or more batteries of CGM transmitter 400. Each of CGM transmitters 100, 200, 300, and / or 400 can be removed from one CGM sensor assembly and reused with other CGM sensor assemblies. CGM sensor assembly 444 can be the same as or substantially similar to CGM sensor assembly 344. The sensor cartridge 460 can be configured to receive and position the CGM sensor assembly 444 and the CGM transmitter 400 therein and can be mounted / attached to the user's body 462 (e.g., torso) in any conventional manner. The sensor assembly 458, which can be, for example, a cannula or a needle, can be inserted into the user's body 462 by known means, such as by using an insertion kit. The sensor assembly 458 can interface with the CGM sensor assembly 444 to allow for substantially continuous sensing of the glucose level in the user's blood. The CGM transmitter 400 can transmit sensor readings and other data received from the CGM sensor assembly 444 to a CGM management unit or other suitable computer device (neither of which is shown) within range of the CGM transmitter 400.

[0041] Figure 5 A method 500 for reducing battery discharge in a wireless continuous glucose monitoring (CGM) transmitter is shown according to one or more embodiments. The method 500 can be used with, for example, the CGM transmitter 100 and the CGM package 102 and / or the CGM transmitter 200 and the CGM package 202. At process block 502, the method 500 can include receiving the CGM transmitter in a package configured to receive and enclose the CGM transmitter therein. For example, Figures 2B-2D As shown in FIG, a CGM transmitter 200 may be received in a CGM package 202 that is configured to receive and enclose the CGM transmitter 200 therein.

[0042] At process block 504, method 500 may include automatically electrically disconnecting a battery of the CGM transmitter from transmitter electronics of the CGM transmitter in response to the CGM transmitter being received in the package. Figure 1 As shown in FIG and as described above, when both the first activation pad 110 -A and the second activation pad 110 -B contact the electrical conductor 130 , the switch disconnect circuit 106 electrically disconnects the battery 104 from the transmitter electronics 108 .

[0043] At process block 506, method 500 may include automatically electrically connecting the battery to the transmitter electronics in response to the CGM transmitter being removed from the packaging. Figure 1 As described, the switch disconnect circuit 106 electrically connects the battery 104 to the power input 118 of the transmitter electronics 108 when the second activation pad 110 -B is electrically floating (eg, not electrically connected to the first activation pad 110 -A via the electrical conductor 130 ).

[0044] Figure 6 A method 600 for reducing battery discharge in a wireless continuous glucose monitoring (CGM) transmitter is shown according to one or more embodiments. The method 600 can be used with, for example, the CGM transmitter 100 and the CGM package 102 and / or the CGM transmitter 200 and the CGM package 202. At process block 602, the method 600 may include coupling an input of a switch disconnect circuit to a positive terminal of a battery and coupling an output of the switch disconnect circuit to a power input of transmitter electronics of the CGM transmitter. For example, referring to Figure 1 , the battery may be battery 104 , the switch disconnect circuit may be switch disconnect circuit 106 , and the transmitter electronics may be transmitter electronics 108 .

[0045] At process block 604, method 600 may include coupling a first activation pad to a negative terminal of a battery. Figure 1For example, the first activation pad may be first activation pad 110 -A, which may be coupled to the negative (“−”) terminal of the battery 104 .

[0046] At process block 606, the second activation pad may be coupled to an enable pin of the switch disconnect circuit. For example, the second activation pad 110-B may be coupled to Figure 1 The switch disconnects the enable pin 116 of the circuit 106 .

[0047] At process block 608, method 600 may include packaging the CGM transmitter in a package that includes an electrical conductor positioned to contact both the first activation pad and the second activation pad, thereby causing the switch to open the circuit to disconnect the battery from the transmitter electronics. Figure 1 As shown in , the CGM transmitter 100 can be packaged in a CGM package 102 that includes an electrical conductor 130 positioned to contact both the first activation pad 110 -A and the second activation pad 110 -B, which causes the switch disconnect circuit 106 to disconnect the battery 104 from the transmitter electronics 108 .

[0048] In some embodiments, the method 600 may further include removing the CGM transmitter from its packaging to automatically activate the CGM transmitter. Removing the CGM transmitter from its packaging causes the switch to disconnect the circuit in response to the electrical conductors in the packaging no longer electrically connecting the first activation pad and the second activation pad together and connecting the battery to the transmitter electronics. Figure 1 As described, when the second activation pad 110-B is electrically floating (i.e., not electrically connected to the first activation pad 110-A, ground, or voltage), the transistor switch 120 is turned on, thereby creating a current path between the input pin 112 and the output pin 114, which connects the battery 104 to the power input 118 of the transmitter electronic device 108.

[0049] In some embodiments, the method 600 may further include providing a package configured to receive and enclose the CGM transmitter therein. Figures 2B-2D As shown in FIG, a CGM package 202 may be provided that is configured to receive and enclose a CGM transmitter 200 therein.

[0050] The foregoing description discloses example embodiments of the present disclosure. Modifications of the above-described apparatus and methods that fall within the scope of the present disclosure should be readily apparent to those skilled in the art. Therefore, although the present disclosure has been disclosed in conjunction with example embodiments, it should be understood that other embodiments may fall within the scope of the present disclosure, as defined by the appended claims.

Claims

1. A method for reducing battery discharge in a wireless continuous glucose monitoring (CGM) transmitter, the method comprising: receiving the CGM transmitter in a package configured to receive and enclose the CGM transmitter therein, the package including an electrical conductor such that first and second activation pads on the CGM transmitter contact the electrical conductor in the package; automatically electrically disconnecting a battery of the CGM transmitter from transmitter electronics of the CGM transmitter in response to the CGM transmitter being received in the package; as well as The battery is automatically electrically connected to the transmitter electronics in response to the CGM transmitter being removed from the packaging.

2. The method of claim 1 , wherein electrically connecting the battery comprises electrically disconnecting at least one of a first activation pad and a second activation pad of the CGM transmitter from an electrical conductor located in the package in response to the CGM transmitter being removed from the package.

3. A wireless continuous glucose monitoring (CGM) transmitter, comprising: a first activation pad and a second activation pad; transmitter electronics; a battery having a positive terminal and a negative terminal, the negative terminal coupled to the first activation pad; as well as a switch disconnect circuit having an input pin, an output pin, and an enable pin, wherein the input pin is coupled to the positive terminal of the battery, the output pin is coupled to a power input of the transmitter electronics, and the enable pin is coupled to the second activation pad; Wherein the switch disconnect circuit is configured to electrically disconnect the battery from the transmitter electronics in response to the first activation pad being electrically connected to the second activation pad.

4. The CGM transmitter of claim 3 , further comprising packaging configured to receive the CGM transmitter therein, the packaging including an electrical conductor located therein such that the first activation pad and the second activation pad each make contact with the electrical conductor when the CGM transmitter is received in the packaging, the first activation pad and the second activation pad making contact with the electrical conductor thereby causing the switch to disconnect the circuit to electrically disconnect the battery from the transmitter electronics.

5. The CGM transmitter of claim 4, wherein when the CGM transmitter is removed from the packaging, the first activation pad and the second activation pad are not in contact with the electrical conductor, thereby causing the switch to open a circuit electrically connecting the battery to the transmitter electronics. The CGM transmitter of claim 4 , wherein the electrical conductor comprises a metal plate or conductive carbonized rubber.

7. The CGM transmitter of claim 6, further comprising a CGM sensor assembly coupled to the transmitter electronics, the CGM sensor assembly comprising sensor electronics configured to continuously measure glucose readings in a bodily fluid via a sensor component.

8. The CGM transmitter of claim 7, wherein the CGM transmitter is removably coupled to the CGM sensor assembly.

9. The CGM transmitter of claim 3, wherein the transmitter electronics comprise: Microcontroller; an antenna coupled to the microcontroller; an analog front end circuit configured to couple to the sensor assembly to sense an analyte in a bodily fluid; as well as A serial bus couples the analog front end circuit to the microcontroller.

10. The CGM transmitter of claim 3, wherein the switch disconnect circuit comprises: a transistor switch connected in series between the input pin and the output pin; a logic gate having first and second inputs and an output coupled to the transistor switch to control operation of the transistor switch; an inverter coupled between the enable pin and a first input of the logic gate; a differential amplifier having an inverting input coupled to the input pin, a non-inverting input coupled to the output pin, and an output coupled to a second input of the logic gate; as well as A current source is coupled between the input pin and the enable pin.

11. The CGM transmitter of claim 10, wherein the transistor switch comprises a MOSFET and the logic gate comprises an OR gate.

12. A method for reducing battery discharge in a wireless continuous glucose monitoring (CGM) transmitter, the method comprising: coupling an input of a switch disconnect circuit to a positive terminal of a battery and coupling an output of the switch disconnect circuit to a power input of transmitter electronics of the CGM transmitter; coupling a first activation pad to a negative terminal of the battery; coupling a second activation pad to an enable pin of the switch disconnect circuit; as well as The CGM transmitter is packaged in a package that includes an electrical conductor positioned to contact both the first activation pad and the second activation pad, thereby causing the switch to open a circuit that disconnects the battery from the transmitter electronics.

13. The method of claim 12, further comprising removing the CGM transmitter from the packaging, wherein the switch disconnects a circuit connecting the battery to the transmitter electronics in response to the electrical conductor not contacting both the first activation pad and the second activation pad.

14. The method of claim 12, further comprising providing the packaging having a front panel, a back panel, a top panel, a bottom panel, and side panels, the packaging configured to receive and enclose the CGM transmitter therein.

15. A battery-operated electronic device comprising: a first activation pad and a second activation pad; Install electronic devices; a battery having a positive terminal and a negative terminal, the negative terminal coupled to the first activation pad; as well as a switch disconnect circuit having an input pin, an output pin, and an enable pin, wherein the input pin is coupled to a positive terminal of the battery, the output pin is coupled to a power input of the device electronics, and the enable pin is coupled to the second activation pad; Wherein the switch disconnect circuit is configured to electrically disconnect the battery from the device electronics in response to the first activation pad being electrically connected to the second activation pad.

16. The battery-operated electronic device of claim 15 , further comprising a package configured to receive the device therein, the package including electrical conductors located therein such that the first activation pad and the second activation pad each make contact with the electrical conductors when the device is received in the package, the first activation pad and the second activation pad making contact with the electrical conductors thereby causing the switch to disconnect the circuit to electrically disconnect the battery from the device electronics.

17. The battery-operated electronic device of claim 16, wherein when the device is removed from the packaging, the first and second activation pads are not in contact with the electrical conductor, thereby causing the switch to open a circuit electrically connecting the battery to the device electronics.

18. The battery-operated electronic device of claim 16, wherein the electrical conductor comprises a metal plate or conductive carbonized rubber.

19. The battery-operated electronic device of claim 16, wherein the switch disconnect circuit comprises: a transistor switch connected in series between the input pin and the output pin; a logic gate having first and second inputs and an output coupled to the transistor switch to control operation of the transistor switch; an inverter coupled between the enable pin and a first input of the logic gate; a comparator having a first input coupled to the input pin, a second input coupled to the output pin, and an output coupled to the second input of the logic gate; as well as A current source is coupled between the input pin and the enable pin.

Images