US5929776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low voltage transceiver
Assignee: Google Technology Holdings LLC
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Filing: 1998-03-23
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Granted: 1999-07-27
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Expires: 2018-03-23
Abstract
Abstract An rf transmitter (319) used with a single cell battery (101) includes a voltage boost circuit (211) integral with a class S amplifier (290). An rf signal to be amplified is separated into its envelope (amplitude) and phase components. The phase component is applied to the input of a power amplifier (260). The envelope is applied to a pulse width modulator (275) which is used to modulate the voltage supplied to the power amplifier (260). The pulse width modulator (275) controls electronic switches (285, 286) which are disposed between the single cell battery (101) and the primary of a step up transformer (211). The secondary of the transformer (211) is coupled to supply voltage to the power amplifier (260). In this manner, the class S amplifier is powered directly from the single cell battery, via a the transformer (211), and power consumption is substantially reduced due to the switching operation of the switches (285, 286).
Inventors
- 👤 Keith Vaclav Warble
- 👤 Ronald Gene Myers
- 👤 Dean Lawrence Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:22
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/20; H03F3/21; H03F3/217; H03F1/00; H03F1/02; H03F1/0205; H03F1/0211; H03F1/0216; H03F1/0222; H03F1/0227; H03F3/24; H03J; H03J1/00; H03J1/0008; H04; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/1607; H04W; H04W52/00; H04W52/02; H04W52/0209; H03F2200/00; H03F2200/351; H04B1/02; H04B1/04; H04B2001/0408; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
130 words
A low power transmitter comprising: a single cell battery; a step up transformer having a primary winding and a secondary winding; a separation circuit receiving a modulated rf signal and providing an envelope signal and a phase signal; a pulse width modulator having an input coupled to said separation circuit for receiving said envelope signal and providing pulse width modulated output signals; an electronic switch having switched outputs and one or more control inputs being responsive to said pulse width modulated output signals, said electronic switch disposed between said battery and said primary winding and operable to switchably connect said primary winding to said battery; and a rf power amplifier having a first input coupled to said phase signal and having a voltage supply input coupled to said secondary winding.
Claim 2
Dependent Claim
130 words
A low power transmitter comprising: a single cell battery; a step up transformer having a primary winding and a secondary winding; a separation circuit receiving a modulated rf signal and providing an envelope signal and a phase signal; a pulse width modulator having an input coupled to said separation circuit for receiving said envelope signal and providing pulse width modulated output signals; an electronic switch having switched outputs and one or more control inputs being responsive to said pulse width modulated output signals, said electronic switch disposed between said battery and said primary winding and operable to switchably connect said primary winding to said battery; and a rf power amplifier having a first input coupled to said phase signal and having a voltage supply input coupled to said secondary winding.
Claim 3
Dependent Claim
20 words
A transmitter in accordance with claim 1, comprising: a filter disposed between said secondary winding and said voltage supply input.
Claim 4
Dependent Claim
18 words
A transmitter in accordance with claim 2, comprising: rectifying means coupled between said secondary winding and said filter.
Claim 5
Dependent Claim
48 words
A transmitter in accordance with claim 1, wherein: said primary winding comprises a center tapped winding having a center tap and first and second ends, said center tap being coupled to said battery, and said first and second ends being coupled to said battery through said electronic switch.
Claim 6
Dependent Claim
47 words
A transmitter in accordance with claim 4, wherein: said electronic switch comprises a first transistor switch having a first switched path coupled between said first end and said battery and a second transistor switch having a second switched path coupled between said second end and said battery.
Claim 7
Dependent Claim
45 words
A transmitter in accordance with claim 1, comprising: one or more sensing devices coupled to said secondary; an error amplifier coupled to said pulse width modulator input and having a first input for receiving said envelope signal and a second input coupled to sensing devices.
Claim 8
Dependent Claim
20 words
A transmitter in accordance with claim 6, comprising: a filter disposed between said secondary winding and said voltage supply input.
Claim 9
Dependent Claim
18 words
A transmitter in accordance with claim 7, comprising: rectifying means coupled between said secondary winding and said filter.
Claim 10
Dependent Claim
48 words
A transmitter in accordance with claim 6, wherein: said primary winding comprises a center tapped winding having a center tap and first and second ends, said center tap being coupled to said battery, and said first and second ends being coupled to said battery through said electronic switch.
Claim 11
Dependent Claim
47 words
A transmitter in accordance with claim 9, wherein: said electronic switch comprises a first transistor switch having a first switched path coupled between said first end and said battery and a second transistor switch having a second switched path coupled between said second end and said battery.
Claim 12
Dependent Claim
138 words
A transceiver comprising: a singe cell battery; utilization circuits coupled to and receiving power from said battery, said utilization circuits comprising a receiver; a transmitter comprising: a step up transformer having a primary winding and a secondary winding; a separation circuit receiving a modulated rf signal and providing an envelope signal and a phase signal; a pulse width modulator having an input coupled to said separation circuit for receiving said envelope signal and providing pulse width modulated output signals: an electronic switch having one or more control inputs and switched outputs, said electronic switch disposed between said battery and said primary winding and operable to switchably connect said primary winding to said battery; and a rf power amplifier having a first input coupled to said phase signal and having a voltage supply input coupled to said secondary winding.
Claim 13
Dependent Claim
138 words
A transceiver comprising: a singe cell battery; utilization circuits coupled to and receiving power from said battery, said utilization circuits comprising a receiver; a transmitter comprising: a step up transformer having a primary winding and a secondary winding; a separation circuit receiving a modulated rf signal and providing an envelope signal and a phase signal; a pulse width modulator having an input coupled to said separation circuit for receiving said envelope signal and providing pulse width modulated output signals: an electronic switch having one or more control inputs and switched outputs, said electronic switch disposed between said battery and said primary winding and operable to switchably connect said primary winding to said battery; and a rf power amplifier having a first input coupled to said phase signal and having a voltage supply input coupled to said secondary winding.
Claim 14
Dependent Claim
20 words
A transceiver in accordance with claim 11, comprising: a filter disposed between said secondary winding and said voltage supply input.
Claim 15
Dependent Claim
18 words
A transceiver in accordance with claim 12, comprising: rectifying means coupled between said secondary winding and said filter.
Claim 16
Dependent Claim
48 words
A transceiver in accordance with claim 11, wherein: said primary winding comprises a center tapped winding having a center tap and first and second ends, said center tap being coupled to said battery, and said first and second ends being coupled to said battery through said electronic switch.
Claim 17
Dependent Claim
47 words
A transceiver in accordance with claim 14, wherein: said electronic switch comprises a first transistor switch having a first switched path coupled between said first end and said battery and a second transistor switch having a second switched path coupled between said second end and said battery.
Claim 18
Dependent Claim
45 words
A transceiver in accordance with claim 11, comprising: one or more sensing devices coupled to said secondary; an error amplifier coupled to said pulse width modulator input and having a first input for receiving said envelope signal and a second input coupled to sensing devices.
Claim 19
Dependent Claim
20 words
A transceiver in accordance with claim 16, comprising: a filter disposed between said secondary winding and said voltage supply input.
Claim 20
Dependent Claim
18 words
A transceiver in accordance with claim 17, comprising: rectifying means coupled between said secondary winding and said filter.
Claim 21
Dependent Claim
48 words
A transmitter in accordance with claim 16, wherein: said primary winding comprises a center tapped winding having a center tap and first and second ends, said center tap being coupled to said battery, and said first and second ends being coupled to said battery through said electronic switch.
Claim 22
Dependent Claim
47 words
A transceiver in accordance with claim 19, wherein: said electronic switch comprises a first transistor switch having a first switched path coupled between said first end and said battery and a second transistor switch having a second switched path coupled between said second end and said battery.
Claim 23
Independent Claim
119 words
A method of operating a transceiver comprising a transmitter and utilization circuits from a single cell battery, comprising: operating said utilization circuits directly from said single cell battery; separating an rf signal to be transmitted into an envelope signal and a phase signal; applying said envelope signal to a pulse width modulator to produce a pulse width modulated signal; utilizing said pulse width modulated signal to control an electronic switch disposed between said single cell battery and a primary winding of a voltage step up transformer to modulate power supplied to said transformer; and supplying power to an rf amplifier from a secondary winding of said transformer, said phase signal being applied to an input of said power amplifier.
Claim 24
Independent Claim
119 words
A method of operating a transceiver comprising a transmitter and utilization circuits from a single cell battery, comprising: operating said utilization circuits directly from said single cell battery; separating an rf signal to be transmitted into an envelope signal and a phase signal; applying said envelope signal to a pulse width modulator to produce a pulse width modulated signal; utilizing said pulse width modulated signal to control an electronic switch disposed between said single cell battery and a primary winding of a voltage step up transformer to modulate power supplied to said transformer; and supplying power to an rf amplifier from a secondary winding of said transformer, said phase signal being applied to an input of said power amplifier.
Claim 25
Dependent Claim
19 words
A method in accordance with claim 21, comprising: filtering the power supplied from said secondary to said power amplifier.
Claim 26
Dependent Claim
23 words
A method in accordance with claim 21, wherein; said step up transformer steps up the voltage of said battery by a predetermined factor.
References Cited (Backward Citations)
US5590419A
Cited
US5781067A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-07-26 | 2003-01-25 | 2003-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-07-26 | 2007-01-25 | 2007-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-07-26 | 2011-01-25 | 2011-07-27 | $7700.00 | Window Closed / Lapsed |